"Designed for use on harder surfaces such as concrete and rock and equally at home on abraisive surfaces like carpet and 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 and protect your tripod on a variety of terrains and climates, for years to come. Each pack comes with 3 Heelz, with a 1/4""-20 thread and 3/8"" stainless steel threaded sleeve. Heelz are universally compatible with any tripod that has either of these standard fittings.|Compatibility: Tripod|Thread Size: 1/4""-20|Material: Stainless steel"