Triple Threat Aluminum Bar sole provides solid, edge to edge aluminum coverage that morphs to surrounding geology for positive grip.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-moldedstainless-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.