The tool has a durable steel base plate that can be easily mounted to your work bench. The breaker has a long lever action handle to break the toughest of chains. The spinner has different anvils to accommodate 1/4 in., 0.325 in., 3/8 in., 0.404 in., 7/16 in. and 1/2 in. pitch. Fast, effortless rivet spinning, with built-in thrust bearing for low friction.