The Ascot Locking Lug Key Set is designed to remove locking lug nuts on wheels, and includes lug keys for a variety of lug styles. Each key is made from heavy duty, heat-treated chrome vanadium steel. The double hex-head design fits most lug wrenches, and the thin sockets and extra-long lug keys help prevent nicks, scratches and damage to the wheel. The 16-pc set comes with both SAE and metric pieces that can be used on spline, star, hex and fluted hex fasteners. For easy storage and organization, the keys come inside a blow molded case with an application guide included on the inner lid. Included hex pieces: 11mm, 12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm. Included Sockets: (2) 5/8", 41/64", 45/64", (2) 15/32", 19/32", (2) 11/16", 3/4", 7/16", 5/8", (2) 1/2", 13/16", 9/16”.