Each box contains 2 Trac-Grabber blocks; Cheaper alternative to snow chainsmDesigned to be used by both men and women,Tire-Grabber is an innovation designed to enhance the ability of a slipping tire to extract itself from a poor traction situation,Tire-Grabber block measures 9"（228mm) (L) x 3.5"(89mm) (W) x 1.5" (38mm)(Depth), Easy to install, safe to use and affordable