The HP Tools Heavy Duty Chain Breaker is new and improved as of 2020! An easy way to replace your chain with a tool that is easy to use, durable, portable and economical. Constructed with a hardened tool steel pin for maximum durability. Works with many different motorcycle chains from 420, 428, 520, 525, and 530 non-O-ring and O-ring chains. Chamfered hole where the chain pin seats into the breaker pin guide decreases chances of the chain slipping off the tool while in use.