Regular push-through steel spike pack for use with Worktrax, Worktrax Plus, and Extreme Ice Cleats. Provides added traction for shake roofs, wood surfaces and ice. Shallow penetration. Length = 3mm, 40 per pack. Single unit dimensions 6x3x1'', one size. Features: Replacement spikes for the Extreme Ice cleats, sure-footed traction on wood and ice, 28 durable push through spike construction on the heel and ball of the foot for ice biting traction where you need it, replaceable studs available, 40 per pack. Material: Steel.