This #420 chain puller is manufactured using high quality tool grade steel and is one of the highest quality and longest lasting chain pullers on the market. CP1 Chain puller/ holder is manufactured to work with a wide range of chain sizes including; #410, #415, #415H, #42, #420, #423, #428, #428H, And #43 Roller Chain. This chain puller is a high quality, durable, and dependable tool.