This US PRO Tools 8 Piece 1/2" Impact Hex Allen Socket Bit Tool Set is designed for heavy-duty use. Made from Chrome Molybdenum Steel with a Black Phosphate finish, these bits are built to withstand impact. They can be used with impact guns, ratchets, or breaker bars. Each socket features a drilled end for a retaining ball bearing and comes supplied in a coloured moulded storage case. The set includes sizes H5, H6, H8, H10, H12, H14, H17, and H19mm, with a length of 78mm.