Korkers CastTrax Cleated Overshoe Quick release buckle and strap system for easy on/off 36 replaceable durable threaded carbide spikes per pair placed under toe, heel and ball of foot Molded rubber walls at toe, heel and side provide secure fit Combination of aggressive rubber lug and carbide spike pattern provides traction on any surface Includes 10 additional carbide replacement spikes and 1 buckle