BikeMaster Chain Breaker 420-620 Replacement Pin Chain Tool Accessories - Sz. 3.5mm At BikeMaster, they understand the quality and performance that motorcycle owners demand. They also understand that quality should be affordable. Not just for professional riders and mechanics, but for the everyday rider / mechanic as well. That is why BikeMaster continues to bring that level of quality and performance to all riders with their complete line of tools, parts and accessories at affordable prices.Super hardened replacement pin for BikeMaster Chain Breaker 420-630.Keep one handy.