ALPHA MOTO Motorcycle Cam Drive Chain Breaker Riveter Rivet Riveting Cutter Tool SUPERIOR QUALITY BEWARE OF INFERIOR QUALITY FLOODING MARKET FROM CHINA This tool is designed to rivet chain links to form an endless chain and is versatile enough to be used on cam chain to drive chains or as a chain breaker by pushing the pin out. Each kit includes 3 pin sizes to fit a variety of chains. This tool will break and rivet 420-630 rear drive chains. It comes with 2mm, 3mm, 4mm, replacement tips for different size Cam Chains.