RK Racing Chain UCT2100 Universal Chain Tool Kit Quickly and easily breaks 40 and 50 type chain; easily press-fits tight tolerance 40, 50 and 60 O-ring chain side plates to the correct depth for clip or rivet link installation; Universal Chain Breaker, Cutter, Press-Fit and Rivet Tool Kit New ergonomic handle allows for a more comfortable and secure grip Flares RK's special pin hole rivet links to the proper dimension to secure side plates in place Updated with laser etched parts for easy identification and replacement SKH9 tool steel grade cutting pin works on most brands of chains (Do not use to cut 630 and 632 Type Chain)