Teng Tools 9203N 1/2" Drive 17, 19 & 21MM 6 Point Deep Metric Wheel Nut Impact Sockets 1/2" drive 17mm, 19mm and 21mm 6 point deep metric impact sockets. To be used for wheel nuts. Made in chrome molybdenum with a black finish and protective inserts for use on aluminium wheels. Supplied as a set of three. What is included: 1 x Teng Tools 9203N 1/2" Drive 17, 19 & 21MM 6 Point Deep Metric Wheel Nut Impact Sockets