FeatureFor deglazing holes 2»-6-1/2» in diameter. Easily adjust the range and pressure placed against your cylinders for well-controlled tension and effectiveness in creating a smoother, cleaner surfaceMade of premium metal materials provide this brake caliper hone tool with strength, durability, and longevityThis cylinder hone brake caliper tool fits your small cars, import, and motorcycle cylinders; Always use brake fluid to keep your engine hone tool and brake parts properly lubricated while workingOperation:1. Spray lubricant on the stones or the cylinder bores. Get the hone set up on the drill.2. Insert the engine hone into the cylinder and run the drill at low speed between 300-700 RPM. Move the hone up and down around once a second.3. After Honing, Use a paper towel to wipe out the inside of cylinder.Knurled wheel adjusts spring pressure of stones against cylinder boreDurable flexible shaft for easy use and self-centeringCylinder Hone features 3 replaceable 3-Inch long 220 grit stonesNote: Don’t Push or Pull the stones more than 3/4 Inch out of the cylinder. Don’t Run the engine hone for more than 3 Mins.