304190 Toledo Piston Ring Compressor 60-175mm For quick and easy installation of pistons and rings into the engine cylindersFeature self-locking ratchet assembly and wide band design to enable all piston rings to be compressed in one easy operationSpring steel band wraps around the rings and pistonAdjustable bore diameter using adjusting key providedManufactured from high grade spring steelHeight: 100mm Capacity: 60 to 175mm (2 3/8 inch to 7 inch)