Material: Chrome Vanadium Steel Thin-walled sockets for use on alloy wheels. With a plastic coating to protect your alloy wheels Suitable for pneumatic screwdrivers and impact drivers This is an ideal choice for the professional, the range is so extensive that it covers a wide range of markets and applications Product Description: Thin-walled sockets for use on alloy wheels. Thin-walled sockets for use on alloy wheels. The tough nylon coating on the outside of the sockets prevents chips and scratches inside the wheel nut holes Specifications: Material: Chrome Vanadium Steel Quantity: 3 pcs Sizes: 17 mm, 19mm and 21mm. Fits any 1/2" ratchet/bar. Corrosion resistance: Hardened, hardened, and anodized material. Package includes: 1 x 3pcs Impact Sockets