Designed for use on harder surfaces such as concrete & rock & equally at home on abraisive surfaces like carpet & vinyl Heelz are the perfect accompaniment for your tripod. Heelz will provide additional stability whilst making your tripod look epically cool. Made from premium stainless steel Heelz are made to support & protect your tripod on a variety of terrains & climates for years to come. Compatibility. Each pack comes with 3 Heelz with a 14-20 thread & 38 stainless steel threaded sleeve. Heelz are universally compatible with any tripod that has either of these standard fittings.