This motor cycle chain breaker is used for the repair splitting and riveting of new and old motorbike chains the chain breaker is made from heat treated hardened steel and can be used with chain pitches from 35 to 630heavy duty chains will require the pin heads to be ground off prior to breaking supplied with four push pin sizes for various chain pitches the square design can easily be bolted to a work surface fastened in a vice or held by handhandle winds push pins to remove rivets fro