1/2 inch drive deep 17mm, 19mm, and 21mm sockets accommodate most modern car metric lug nuts. The anti-marring sleeves help prevent scratching or damage to wheels when installing or removing lug nuts. The anti-marring sleeve is also removable in for wheels with very tight lug nut pockets. Sockets are color coded by size so you know which to get at a glance, no grabbing the wrong socket from guessing or being unable to read the size. Comes with a blow molded carrying case for portability, and so you don't have a bunch of loose sockets rolling around the tool box.