This brake cylinder honing can be attached to an electric drill or air drill, and the rotation of the drill (centrifugal force) allows the whetstone to expand and adhere to the inner walls of the cylinder, and evenly grind the inside of the cylinder.
[Range of use] 1.0 - 2.5 inches (25 - 63 mm)
Blade: Total length: 1.2 inches (30 mm), Grit: #220
[Caution] When grinding, please pour oil into the blade and use it. Be sure to rotate it after inserting it into the cylinder.