Honing tool for surface treatment in the internal working surface of brake and clutch cylinders and small-bore cylinders in cars, motorcycles, lawnmowers, outboard motors, etc. Effective range 18 – 89 mm. Sets of replacement abrasive stones 19, 28, 28.8, and 51 mm included. Suitable for the manual electric or pneumatic drill; flexible shaft; adjustable preload of honing stones. Comes in a plastic carry case.