Triple Threat(TM) Aluminum Hex Discs provide a combination of biting edges and soft aluminum that morph to surrounding geology to create positive grip in rugged, rocky terrain. Traction: The 100% customizable sole that gives you endless spike, bar and hex disc configurations for the ultimate in options. Chassis: Sticky rubber outsole with over-molded stainless-steel receptacles which accept any combination of Triple Threat spikes, bars, or hex disks. Fit: Match the sole size with your OmniTrax 3.0 boot for a perfect fit. Please Note: Korkers Omnitrax v3.0 soles are compatible ONLY with Korkers boots that use the Omnitrax sole system, and do NOT attach to boots from other brands.