Flex-Hone GB31424 Flex-Hone®, 3-1/4 Inch (83Mm) Diameter










- QUALITY - Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
- DESIGN - The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
- FINISHING BENEFITS - Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
- CROSSHOLE DEBURRING - Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
- 240 GRIT SILICON CARBIDE ABRASIVE - Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer).
- WHAT'S INCLUDED -1 Each of a GB Standard Duty FLEX-HONE - 3.250"(83mm) Bore Diameter, 3.50 inch Abrasive Part Length, 0.310 inch Shank Diameter, 13.5 inch Overall Length. For Use on Bore Diameters Between 3.001"-3.250". PLEASE NOTE - ORDER BY BORE SIZE.
Flex-Hone BC10018 Flex-Hone®, 1 Inch (25.4Mm) Diameter









- QUALITY - Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
- DESIGN - The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
- FINISHING BENEFITS - Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
- CROSSHOLE DEBURRING - Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
- 180 GRIT SILICON CARBIDE ABRASIVE - Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 30 - 40 Microinch (.7 - 1 Micrometer).
- WHAT'S INCLUDED -1 Each of a BC Standard Duty FLEX-HONE - 1.000"(25.4mm) Bore Diameter, 3 inch Abrasive Part Length, 0.228 inch Shank Diameter, 8 inch Overall Length. For Use on Bore Diameters Between 0.939"-1.000". PLEASE NOTE - ORDER BY BORE SIZE.
Pro-Graad SILICON CARBIDE Twistflex Cylinder Hone







- IN THE BOX - - 1 each Pro-Graad TwistFlex Size - 4-1/4 inch 4.25 inch (108mm) Bore Diameter, Working Length of Brush 3.54 inch (90mm), Shank Diameter 0.354 inch (9mm), Overall Length 13-1/2 inch (343mm). FOR USE ON BORE DIAMETERS 4.00 inch - 4.27".
- OVERSIZED, PRECISE FITMENT - - The Pro-Graad TwistFlex 4 1/4 Cylinder Honing & Deburring Tool is manufactured oversized - ORDER BY THE BORE SIZE. Brush will be approximately ten percent oversized, but will easily conform and fit into the bore size diameter due to the flexibility of the honing tool stems.
- CONSISTENT PRESSURE & FINISHING - - Pro-Graad TwistFlex Cylinder Honing & Deburring Tool brushes have round abrasive spheres fastened to ends of flexible stems, which produces pressure and finishing evenly and consistently. Excels on mild steel, stainless steel, cast iron and other softer ferrous materials.
- APPLICATION - - The Pro-Graad TwistFlex Cylinder Honing & Deburring Tool can be run with hand tools, drill press, or CNC equipment. Apply a lubricant liberally such as a honing tool lubricant, 10-30 weight motor oil, or transmission fluid prior to using honing tool brush. Max RPM is 600, however optimum range is 300 - 500 RPM. Tip - If producing cross-hatching pattern, less is best - maximum of two passes should be done with brush within 20-45 seconds of total run time, averaging between 10-55 strokes.
- SELF CENTERING - - The 4.25 inch TwistFlex Cylinder Honing & Deburring Tool is self-centering, self-aligning and will conform to the bore diameter to provide consistent surface finishing, as well as deburring any cross-drilled holes. The brush is self-compensating to produce a consistent finish throughout the life of the tool.
- PRODUCT GUARANTEE - - All Pro-Graad TwistFlex products are made with quality materials, which exceed industrial grade standards. We are driven to deliver high-quality, high-performing products to the end user. This is why we stand behind our 100% Product Guarantee. If you are not satisfied with the product, simply return your purchase within 30 days, and we will replace or refund your order. Pro-Graad is an American Company with US Based Customer Support.
Flex-Hone GBD33424 Flex-Hone®, 3-3/4 Inch (95Mm) Diameter










- QUALITY - Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
- DESIGN - The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
- FINISHING BENEFITS - Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
- CROSSHOLE DEBURRING - Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
- 240 GRIT SILICON CARBIDE ABRASIVE - Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer).
- WHAT'S INCLUDED -1 Each of a GBD Heavy Duty FLEX-HONE - 3.750"(95mm) Bore Diameter, 5 inch Abrasive Part Length, 0.310 inch Shank Diameter, 13.5 inch Overall Length. For Use on Bore Diameters Between 3.501"-3.750". PLEASE NOTE - ORDER BY BORE SIZE.
Flex-Hone BC34240AO Flex-Hone, 3/4"(19Mm) Diameter










- QUALITY - Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
- DESIGN - The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
- FINISHING BENEFITS - Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
- CROSSHOLE DEBURRING - Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
- 240 GRIT ALUMINUM OXIDE ABRASIVE - Excellent on Aluminum, Brass, Bronze, and softer non-ferrous materials. 240 AO is commonly used for deglazing Nikasil cylinders. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer).
- WHAT'S INCLUDED -1 Each of a BC Standard Duty FLEX-HONE - 0.750"(19.1mm) Bore Diameter, 2.50 inch Abrasive Part Length, 0.190 inch Shank Diameter, 8 inch Overall Length. For Use on Bore Diameters Between 0.710"-0.750". PLEASE NOTE - ORDER BY BORE SIZE.
Flex-Hone 14353 Automotive Flex-Hone® Kit




- QUALITY - Proudly Made in the USA. The FLEX-HONE is long lasting, lowering total cost of use compared to other brush options.
- INCLUDES - Kit contains 10 popular automotive FLEX-HONE sizes - 10mm, 1/2", 5/8, 3/4, 7/8, 1, 1-1/4, 1-1/2 1-3/4 and 2.
- IDEAL FOR - Silicon carbide abrasive is ideal for mild steel, stainless steel and cast iron materials.
- DESIGN - The FLEX-HONE is manufactured to be self-centering, self-aligning and self-compensating for wear for easy use. Can be used in virtually any rotating spindle.
Flex-Hone GB314240AO Flex-Hone®, 3-1/4 Inch (83Mm) Diameter










- QUALITY - Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
- DESIGN - The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
- FINISHING BENEFITS - Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
- CROSSHOLE DEBURRING - Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
- 240 GRIT ALUMINUM OXIDE ABRASIVE - Excellent on Aluminum, Brass, Bronze, and softer non-ferrous materials. 240 AO is commonly used for deglazing Nikasil cylinders. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer).
- WHAT'S INCLUDED -1 Each of a GB Standard Duty FLEX-HONE - 3.250"(83mm) Bore Diameter, 3.50 inch Abrasive Part Length, 0.310 inch Shank Diameter, 13.5 inch Overall Length. For Use on Bore Diameters Between 3.001"-3.250". PLEASE NOTE - ORDER BY BORE SIZE.
Flex-Hone BC5818 Brush Research Flex-Hone Cylinder Hone










Flex-Hone FHP Flex-Hone Oil, Specially Formulated Honing Oil



- INSTRUCTIONS FOR USE - Specially formulated for use with the FLEX-HONE in honing all types of metals.
- CONTAINS - A blend of honing and lapping oils, a lard oil to stop galling of aluminum and aide in lubricating of the surface.
- QUALITY - Proudly blended and bottled in the USA by Brush Research Manufacturing, inventors and makers of the FLEX-HONE.
Twistflex 4-1/8" SILICON CARBIDE, 240 GRIT Pro-Graad Twistflex Cylinder Hone








- What's Included - 1 each Pro-Graad TwistFlex Size - 4-1/8 inch (105mm) Hole Diameter, Working Length of Brush - 3.54 inch (90mm), Shank Diameter - 0.354 inch (9mm), Overall Length - 13-1/2 inch (343mm). FOR USE ON BORE DIAMETERS 3.90 inch - 4.15".
- The Pro-Graad TwistFlex 4 1/8inch Cylinder Honing & Deburring Tool is manufactured oversized - ORDER BY THE BORE SIZE. Brush will be approximately ten percent oversized, but will easily conform and fit into the bore size diameter due to the flexibility of the honing tool stems.
- Pro-Graad TwistFlex Cylinder Honing & Deburring Tool brushes have round abrasive spheres fastened to ends of flexible stems, which produces pressure and finishing evenly and consistently. For Engine Cylinders, Brake Cylinders, Hydraulics and Valve Guides.
- The Pro-Graad TwistFlex Cylinder Honing & Deburring Tool can be run with hand tools, drill press, or CNC equipment. Apply a lubricant liberally such as a honing tool lubricant or 10-30 weight motor oil prior to using honing tool brush. Max RPM is 600, however optimum range is 300 - 500 RPM. Tip - If producing cross-hatching pattern, less is best - maximum of two passes should be done with brush within 20-45 seconds of total run time, averaging between 10-55 strokes..
- The 4 1/8 inch TwistFlex Cylinder Honing & Deburring Tool is self-centering, self-aligning and will conform to the bore diameter to provide consistent surface finishing, as well as deburring any cross-drilled holes. The brush is self-compensating to produce a consistent finish throughout the life of the tool.
- All Pro-Graad products are made with quality materials, which exceed industrial grade standards. We are driven to deliver high-quality, high-performing products to the end user. This is why we stand behind our 100% Product Guarantee. If you are not satisfied with the product, simply return your purchase within 30 days, and we will replace or refund your order. Pro-Graad is an American Company with US Based Customer Support.
Flex-Hone RMFH240Z25 Brush Research Flex-Hone






- MADE IN USA - The FLEX-HONE is a BRM invention and is still Proudly Made in the USA.
- ELIMINATE BRAKE NOISE - Easily produce the ideal non-directional crosshatch finish in seconds to lower harmonic vibration.
- APPLICATIONS - Ideal for new and re-turned rotors, flywheels and clutch plates.
- FINE GRIT - Choose Fine Grit FLEX-HONE for Rotors (240 grit) for light duty vehicles and when appearance is important like motorcycles and exposed rotors.
Twistflex 3" SILICON CARBIDE, 240 GRIT Pro-Graad Twistflex Cylinder Hone








- What's Included - 1 each Pro-Graad TwistFlex Size - 3 inch (76mm) Hole Diameter, Working Length of Brush - 3.15 inch (80mm), Shank Diameter - 0.315 inch (8mm), Overall Length - 13-1/2 inch (343mm). FOR USE ON BORE DIAMETERS 2.80 inch - 3.02".
- The Pro-Graad TwistFlex 3inch Cylinder Honing & Deburring Tool is manufactured oversized - ORDER BY THE BORE SIZE. Brush will be approximately ten percent oversized, but will easily conform and fit into the bore size diameter due to the flexibility of the honing tool stems.
- Pro-Graad TwistFlex Cylinder Honing & Deburring Tool brushes have round abrasive spheres fastened to ends of flexible stems, which produces pressure and finishing evenly and consistently. For Engine Cylinders, Brake Cylinders, Hydraulics and Valve Guides.
- The Pro-Graad TwistFlex Cylinder Honing & Deburring Tool can be run with hand tools, drill press, or CNC equipment. Apply a lubricant liberally such as a honing tool lubricant or 10-30 weight motor oil prior to using honing tool brush. Max RPM is 1200, however optimum range is 600 - 800 RPM. Tip - If producing cross-hatching pattern, less is best - maximum of two passes should be done with brush within 20-45 seconds of total run time, averaging between 10-55 strokes..
- The 3 inch TwistFlex Cylinder Honing & Deburring Tool is self-centering, self-aligning and will conform to the bore diameter to provide consistent surface finishing, as well as deburring any cross-drilled holes. The brush is self-compensating to produce a consistent finish throughout the life of the tool.
- All Pro-Graad products are made with quality materials, which exceed industrial grade standards. We are driven to deliver high-quality, high-performing products to the end user. This is why we stand behind our 100% Product Guarantee. If you are not satisfied with the product, simply return your purchase within 30 days, and we will replace or refund your order. Pro-Graad is an American Company with US Based Customer Support.
Flex-Hone 00054 Chamber Flex-Hone, Aluminum Oxide




- QUALITY - Proudly Made in the USA. The FLEX-HONE improves firearm performance. Designed specifically for Shotgun Chambers.
- IMPROVES THE FINISH - The FLEX-HONE will produce a smooth and consistent finish improving emptying and reloading
- QUICK AND EASY - Efficiently removes oxidation and corrosion resulting in a more polished smoothbore with a beautiful finish
- IMPROVE ACCURACY - The superior surface finish results in greater accuracy, reduced wear and longer life for your shotgun.
Brm FBA_GBD41424 Flex Hone 4 Inch To 4.25 Inch Heavy Duty Ball Hone Sbc Sbf New

- 240 Grit
- Fits common V-8 Ford Chev Chrys 4 inch - 4.250 inch bore applications
Flex-Hone 12159 Flex-Hone® For Firearms




- QUALITY - Proudly Made in the USA. The FLEX-HONE improves firearm performance.
- IMPROVES THE FINISH - Removes nicks and scratches and allows the rounds to fall from the cylinder with ease, and eject smoothly from your chamber.
- REMOVES BRASS SCARRING - Reloads will enter quickly and smoothly.
- CLEANING BENEFITS - Efficiently removes oxidation and corrosion from your rifle chamber.
- STYLE - For .22 Long Rifle Chamber in 800 Grit Silicon Carbide
Flex-Hone 09247 Rifle Chamber Flex-Hone




- QUALITY - Proudly Made in the USA. The FLEX-HONE improves firearm performance.
- IMPROVES THE FINISH - Removes nicks and scratches and allows the rounds to fall from the cylinder with ease, and eject smoothly from your chamber.
- REMOVES BRASS SCARRING - Reloads will enter quickly and smoothly.
- CLEANING BENEFITS - Efficiently removes oxidation and corrosion from your rifle chamber.
- STYLE - For 5.56 NATO in 800 Grit Silicon Carbide
Kolvoii US-K038 Cylinder Hone Tool Set







- PROFESSIONAL KIT - Our Engine Cylinder Hone Tool Set includes 4 different-sized hone tools, for precise honing in hard-to-reach areas, ensuring comprehensive engine maintenance. It works on all vehicles with cylinders between 3/4 inch and 7 inch diameters. It comes with extra 11 piece replacement honing stones in 220 grit, available adds convenience and reliability to your cylinder hone tool.
- PERFORMANCE MAINTENANCE - The cylinder hones is made from structural-grade A36 steel with zinc coating, to ensure superior strength and durability, can effectively removes carbon, rust, glaze, imperfections, and wear on the cylinder walls, for optimal engine performance.
- EASY-TO-USE - The self-aligning design allows the flexible shaft to automatically adjust and align itself within the cylinder bore, By turning the screw clockwise or counterclockwise, the user can increase or decrease the tension of the spring-loaded arms that hold the honing stones. allows the user to adjust the honing force according to the different piston diameters and the desired surface finish.
- SET SPECIFICATION - The set includes - 1pc 1-1/8 inch hone with 2 claws,1pc 1-1/8 inch hone with 3 claws, 1pc 2 inch hone with 3 claws, and 1pc 3 inch hone with 3 claws. Extra replacement honing stones - 3 pcs 4 inch grind stones, 3 pcs 2 inch grind stones, 5 pcs 1-1/8 inch grind stones, usage instructions and a storage case.
- MULTIPLE APPLICATIONS - They can be used on various types of engines, including those in cars, motorcycles, boats, and small engines like lawnmowers.
- 100% SATISFACTION SERVICE - We will make every effort to provide customers with high quality products and satisfactory service. If you have any question before or after purchase, please email us at any time, we will solve it in your favor.
Brm BC7818 Small Flex Hone For Lifter Bore Sbc Bbc .875 Inch Or 7/8 Inch

Flex-Hone 00048 Shotgun Barrel Flex-Hone

- QUALITY - Proudly Made in the USA. The FLEX-HONE improves firearm performance. Designed specifically for Shotgun Barrels.
- IMPROVES THE FINISH - The FLEX-HONE will produce a smooth and consistent finish that will prevents plastic from building up as quickly in the future.
- QUICK AND EASY - Efficiently removes oxidation and corrosion resulting in a more polished smoothbore with a beautiful finish.
- IMPROVE ACCURACY - The superior surface finish results in greater accuracy, reduced wear and longer life for your shotgun.
Flex-Hone CHB14M18 Brush Research Ch-B Medium Chamfer Flex-Hone





- QUALITY - Proudly Made in the USA. The FLEX-HONE is long lasting, lowering total cost of use compared to other brush options.
- BENEFITS - The FLEX-HONE for Chamfer Blending blends and radiuses sharp edges and removes microburrs on chamfered holes eliminating stress risers caused by the chamfering operation.
- STYLE - Designed for 0.016 inch-0.030 inch Chamfer Size Range.
- MATERIALS - Suitable for mild steel, stainless steel, cast iron and other softer ferrous materials.