7 pcs Piston Ring Compressor Set including 1pc Ratchet pliers and 6 pcs Bands For cylinder installation. 6x Piston Ring bands, 1x Ratchet pliers, 1x Storage case. Made of high quality carbon steel and durable iron; The pliers feature a ratcheting lock to hold the handles in position for easy piston installation, and can be used parallel or perpendicular to the cylinder block.