3 pcs 1/2"Drive Deep Impact Socket Set. 3 PCS. Contents : 17mm, 19mm, 21mm By identifying the different color coated, the operator can easily pick up the size needed. With the external sheath, the working object can be well protected from being rubbed, scratched,impacted…etc. With the 85mm extra long socket, to loosen or tighten bolt or nut in deeper hole become easier and convenient. Note : Impact socket for aluminum rim wheel nuts, with polymeric material insets. 3 pcs 1/2"Drive Deep Impact Socket Set