Complete chain tool for most 520, 525 and 530 standard and O-ring chainsBreak, press, and rivet your chain with one compact toolWill rivet hollow nose master links (will not rivet solid soft-nose pins)Will push pin completely through link/side plateHardened body, riveting tip and breaker pin for strength and durabilityRemovable handle for compact storagePerfect for your trail/road tool pack if you have a chain with a rivet master linkOne year limited warranty