6 point spline drive tuner socket key tool for six-spline wheel lock lug nuts - 17.6mm inner diameter - compatible with 19mm (3/4) and 21mm (13/16) replacement hex socket - black 1pc stancemagic [ important compatibility information ]</br> - compatible with most six-spline lug nuts on the market.</br> - there are a few different types of spline lug nuts, please check to make sure your lug nuts are 6-sided spline.</br> - this socket key with all of our spline lug nut kits. so if you are looking for an extra key for a set you bought from us, this is the correct item.</br> - socket key has a 20.5mm (0.81 inch) diameter. this means your wheel's lug holes must be larger than 20.5mm (0.81 inch) for this tool to fit.</br></br>