High Quality Chrome Moly Steel, heat treated for strength and durability. Will fit any 1/2 Inch Impact Wrench or Manual Ratchet Driver. Colour coded sockets for easy identification. 360° Non-scratch plastic sleeve and insert protect bolt tops, wheel rims and lug nuts, to prevent scratches during use. Specification 1: 3pcs set Most popular sizes 17mm, 19mm, 21mm in 85mm length. All impact sockets will be delivered in a closable plastic case for transport and storage. Specifications: Material: Chrome Molybdenum Steel Drive: 1/2 Inch Sizes: 17mm, 19mm, 21mm Length: 85MM Package contents: 1 x 3 PCs Thin Wall Deep Impact Nut Socket Alloy Wheel 1/2" Drive 17mm 19mm 21mm Kit. Specification 2: 4pcs set Most popular sizes 17mm, 19mm, 21mm and 22mm in 85mm length. All impact sockets will be delivered in a closable plastic case for transport and storage. Specifications: Material: Chrome Molybdenum Steel Drive: 1/2 Inch Sizes: 17mm, 19mm, 21mm and 22mm Length: 85MM Package contents: 1 x 4 PCs Thin Wall Deep Impact Nut Socket Alloy Wheel 1/2" Drive 17mm 19mm 21mm 22mm Kit. Specification 3: 11pcs set Most popular metric sizes 15/17/19/21/22/23/24/27mm, pattern type 17/21mm and imperial size 7/8" all in 85mm length. All impact sockets will be delivered in a closable plastic case for transport and storage. Specifications: Material: Chrome Molybdenum Steel Drive: 1/2 Inch Metric Sizes: 15/17/19/21/22/23/24/27mm Imperial Size: 7/8 Inch Pattern Type: 17/21mm Length: 85MM