The Lisle Corporation 7-pc Flip Socket Set, No. 12950, offers two hex sizes in each socket for the removal of standard and damaged lug nuts found on many vehicles. The 6-point impact sockets are made from chrome moly steel and have a black oxide finish. The set includes a 1/2" drive extension, 17mm/17.5mm, 19mm/19.5mm, 21mm/21.5mm, 22mm/22.5mm, 27mm/27.5mm, and a deep thin-walled 19mm/21mm socket. The 19mm/21mm socket includes a plastic sleeve that prevents scratching the wheels. Set comes in blow molded case for storage.