Chain Detacher Breaker Cutter Fit for 25/35/41/40/50/60 415H,428H, 520,530 Roller Chain Motorcycle Bicycle Go Kart ATV Chains.Used for breaking chain, for repairing/replacing roller chain, to add/remove links of chain. help you save time and make you more efficient. Material: High-carbon steel material, composite reinforcement, Extra niddle pin included, durable, spring-pressing and labor-saving design, cut chain into the length your need without any other tools. How to use: Squeeze the handles together to open the jaws. Place jaws around the link you want to break. Release the jaws. The pin should be over the pin in the chain. Turn the handle and the pin of the chain break will push the pin in the chain out. Important note: DO NOT push the pin all the way through the link or it will DESTROY the chain. Works great until the pin is about 1/2 way pushed out. Packaging includes: 1 X #25-60 chain breaker , 2 X extra niddle pin.