Threaded carbide spikes provide added traction on wet and slick surfaces. Features Compatability: Product is designed to be used with the Korkers CastTrax overshoe sandals Durability: Carbide tipped for added bite and durability Length: Length = 7mm Includes: 40 spikes per pack Korkers Casttrax Carbide Spike Kit, 7mm, 40 Pack - Gold