Set of three long 1/2" impact sockets in sizes 17 mm, 19 mm and 21 mm, made of CrMo steel, with a length of 150 mm and thin walls designed for use with alloy wheels. Equipped with replaceable protective sleeves and a chrome finish in three colors for quick size identification. Construction designed for use with impact wrenches. Length 15 cm – allows easy access to deeply recessed bolts in alloy wheels where a standard socket is too short. Chromium-molybdenum steel (CrMo) – resistant to high torque generated by impact wrenches. Thin-wall construction – enables operation in narrow bolt recesses in alloy wheels where a standard thick socket simply will not fit. 3 additional replaceable protective sleeves – protect the rim from scratches during operation. Chrome finish in 3 colors – each size marked with a different color (17 mm, 19 mm, 21 mm) Technical specifications: Material: CrMo steel (chromium-molybdenum) Drive: 1/2" Sizes included: 17 mm / 19 mm / 21 mm Length: 150 mm Construction: thin-wall Protective sleeves: 6 pieces in total Finish: chrome-plated, 3 colors Application: for alloy wheels / impact wrenches Set includes: 17 mm impact socket – 1 pc. 19 mm impact socket – 1 pc. 21 mm impact socket – 1 pc. Additional protective sleeves – 3 pcs. Carrying case – 1 pc.