Fits all Nike golf shoes w/Q-Lok fastener system. Refer to Champ Fitting Guide at http://www.champspikes.com/images/08SpikeGuide.pdf. * Soft durometer TPU for superior comfort and durability * Green-friendly design minimizes marks on the green * Wrench holes formed in rigid material, Primary spring-flex traction elements provide optimum gripping ability * "C" visible wear indicator turns solid when spikes need to be replaced