Toledo Piston Ring Compressor Small 53-125mm 304189For quick and easy installation of pistons and rings into the engine cylinders Feature self locking ratchet assembly and wide band design to enable all piston rings to be compressed in one easy operation Spring steel band wraps around the rings and piston Adjustable bore diameter using adjusting key provided Manufactured from high grade spring steel Height: 75mm Capacity: 53125mm (25)