The K Tool International 70372 strut sprng compressor services a wide range of MacPherson struts without the need to use special adapter shoes. our strut spring compressor is designed with safety in mind as the Jaws are held in place by safety lock pins. The KTI70372 is durable and made to be driven by hand or with an impact wrench Compresses springs ranging from 4" - 9" O.D. with wire diameters of 7/16" - 11/16". Packaged in a blow molded storage case and fully backed by our K Tool International lifetime warranty.