Universal joint action makes grinding of back cylinder easy
Bottom guard plate helps prevent stones from accidentally hitting the crankshaft
Expands quickly to cylinder size with fast action rack and pinion
For use on rack sets 15540 (3 - 4.25 inch range); 15530 (4 - 6.25 inch range); 15560 (63.125 - 10.25 inch range). Clip-on stones and wipers are easily changed in a few seconds. Set consists of two stones and two wipers.