General description 5 piece impact socket set designed for extra thin wall metric drive wheel rims, suitable for both hand use and impact drivers. Technical specifications Socket sizes: 15 mm, 17 mm, 19 mm, 21 mm, 22 mm Drive size: 1/2 inch (12.5 mm) Length: 85 mm Internal square drive with groove and ball bore Other information Plastic coated to protect alloy wheels