The 3 Legged Thing STILETTOZ Tripod Leg Spikes are designed with a long post that can be used to either elevate your tripod legs off rocky or dirty surfaces to protect them, or you can drive them deep into soft ground and anchor your tripod in place for greater stability when you need it. The Stilettoz are made of strong and durable milled stainless steel for longevity and greater stability on hard surfaces like concrete and gravel. You get a set of three spikes—one for each tripod leg—and each is outfitted with a dual 1/4"-20 and 3/8"-16 threaded mounting stud to be compatible with a wide assortment of tripods.