Provides sure-footed traction for a variety of outdoor work applications. Quick release buckle and strap system for easy on, off. Molded rubber walls at toe, heel, and side provide secure fit. Durable push-through steel spikes placed toe, heel, and ball of foot. Worktrax styles include 28 sharp 5mm spikes per pair. Single unit dimensions 16x7x4''. Sizes: M(7.5-9.5), L(10-11.5), XL(12-13), XXL(14-15). Features: Quick release buckle and strap system for easy on, off with 28 push through steel spikes per pair, molded rubber walls at toe, heel, and side provide secure fit, offers traction on slick ice and smooth surfaces, affordable option for the once a year ''do it yourselfer'' or the professional contractor and push through spike options include ''sharp'' steel spikes for shallow penetration for deeper penetration into wood or ice. Material: Rubber, Steel.