General description This tightening socket wrench set is designed specifically for alloy wheels, featuring impact wrench bits in sizes 17 mm, 19 mm, and 21 mm. Made from high-quality Chrome Vanadium Steel, these thin-walled sockets are ideal for use with pneumatic screwdrivers and impact wrenches, providing both durability and protection for your wheels. Technical specifications Material: Chrome Vanadium Steel Quantity: 3 pieces Sizes: 17 mm, 19 mm, 21 mm Fits any 1/2" ratchet/bar Corrosion resistance: reinforced, hardened, and anodized material Other information Package includes: 1 x 3 pieces impact socket wrench The robust nylon coating prevents chipping and scratches in the wheel nut holes.