LISLE CYLINDER HONE STONE AND WIPER SET -- 5 in. long; 3 to 4-1/4 in., 4 to 6-1/4 in., and 6-1/8 to 10-1/4 in. cylinder range; Consist of two stones and two wipers; For 280 Grit; This part is used for engine cylinder hone part number 15000; Compatible with rack set part numbers 15540, 15530, and 15560.