Heel Grounder Cup Style Quick Clasp P/N: HGC1M-C Added to the features of the HGC1M, this grounder uses a push button clasp to make putting on and removing the grounder fast. Adjust the fit the first time and then simply snap the grounder on. The clasp "remembers" the last strap adjustment. The soft, elastic nylon strap is more comfortable than Velcro. Fits boots and cross trainers.