This chain puller/ holder is ultra compact, durable, and manufactured right here in the USA! It is manufactured to work with a wide range of roller chain sizes, including the following chain sizes: #35, #41, #40 #50, #60, 06B, 08B, #410, #415, #415H, #42, #420, #423, #428, #428H, And #43 Roller Chain. This chain puller is manufactured to fit into small places and is made with high quality tool grade steel