This extremely popular spike features a soft durometer for superior comfort and durability. Designed to be non-clogging. Spring-flex traction elements provide optimum gripping ability. The green friendly design minimizes marks on the green. "C" visable wear indicator turns solid when spikes need to be replaced. Available in the Slim-Lok (Tri-Lok) (Fast Twist) system or in the Q-Lok system. Disk pack contains 18 spikes.