Uxcell Magnetic Hex Socket Nut Driver Setter, 8mm x 100mm, 3-Piece Product Name : Hex Driver Bit; Material : Chrome-Vanadium Hex Socket Size : 8mm/ 5/16"; Hex Shank Size : 6.35mm/ 1/4" Overall Size : 15 x 100mm/ 0.6" x 3, 9" (DL); Color : Gray Weight : 139g Package : 3 x Hex Driver Bits