Korkers RockTrax and RockTrax Plus are versatile cleated overshoe products that provides sure-footed traction on mossy rock, ice and slick terrain. RockTrax FA5100 has 28 spikes per pair placed under toe, heel and ball of foot, plus 24 additional spike receptacles available for custom stud placement. RockTrax Plus FA5101 has 52 spikes per pair placed under toe, heel and ball of foot. Quick release buckle & strap system for easy on/off. Molded rubber walls at toe, heel, and side provide secure fit. Durable threaded carbide spikes placed under toe, heel and ball of foot.