The Draper 4 Piece 1/2" Square Drive Locking Wheel Nut Set is designed for the installation & removal of locking wheel nuts on most vehicles (except those fitted with rotating protector shrouds). This kit is manufactured from molybdenum steel, hardened, tempered & chemically blacked for corrosion protection. The set featured reduce tapered internal left hand coarse thread. For use with air & electric tools. Supplied with metal case.