This is a SOLID Stainless Steel Lug Nut. This Stainless Steel Trailer Lug nut is made of 304 Stainless Steel, with a standard 1/2-20 Thread Size and a standard 60 Degree Cone. This is referred to as an acorn Style Lug Nut, with an overall height of 1 5/8 inches. This Style of Lug nut not only full covers your hub studs, but will prevent them from rusting. In addition, this lug nut also WILL NOT RUST! You will use a 13/16 inch socket to remove/install this trailer lug nut. This will fit most 4 lug, 5 lug, 6 lug, and 8 lug trailer idler hubs and brake drum hubs. Ideal for ANY trailer environment! Pays for itself the very firs time you go to replace a tire!!!! No more rusted or difficult trailer lug nuts when the time comes!! Simply apply some spray grease to the hub studs before installing and your good to go!