Heavy duty hex driver impact sockets by Neiko Tools USA. Features: drop forged black chrome vanadium steel, heat treated for strength, hex impact sockets are 3" in overall length, and designed to be used with an 3/8" dr air impact wrench or air ratchet. Set includes: 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", and 1/2".SKU: 9184H