Professional socket for commercial or occasional use 21mm alloy wheel nut socket 1/2" drive so will fit any 1/2" drive ratchet / impact gun / power bar etc... Single hex / 6 sided socket Metric size socket Alloy wheel socket Hard wearing nylon sleeve on the outside of the sockets protects the wheels from chipping and scratching inside of the wheel nut holes Plastic insert inside the socket protects the front face on chrome wheel nuts Suitable for use with impact gun Double deep socket are ideal for garage use Thin walled for access into tight restricted areas Anodised for corrosion resistance