Schwaben's Professional Spring Compressor Kit will compress most styles of strut springs. This is a safe and efficient way to compress strut springs. This set is supplied with every thing you need to get the job done like a pro. Each jaw has safety lips to eliminate slip and is designed to fit the pitch of the spring to ensure maximum surface contact between the jaws and the spring, thus eliminating the risk of the compressor slipping around the spring. Interchangeable jaws are easily changed to correct size for the application. Maximum jaw opening is 300mm.The spindle is driven by a 21mm hex nut and is not designed to be used with a impact gun. Hand turn the nut with a wrench or hand ratchet.Includes:Compressor Body Shaft80-115 mm Yokes110-150mm Yokes140-195mm Yokesconical spring adapter Blow molded case