The Tusk Shock Spring Compressor makes motorcycle shock coil spring removal and installation a simple task. Spring coil hooks and bolt are made from hardened chromoly steel while the outer body is made from stainless steel. The bolt head accepts a 17mm wrench or a 3/8" ratchet to make the compression quick. Makes motorcycle shock spring removal and installation a simple task. Durable chromoly and stainless steel construction. Bolt head accepts a 17mm wrench or a 3/8" ratchet to make the compression quick. Complete with a quality steel holding case. Sold in pairs (a must for spring removal).