uxcell 1/4" Shank 13mm Hex Socket Spanner Nut Driver Bits Gray 5 Pcs Product Name : Hex Driver Bit;Material : Chrome-Vanadium Hex Socket Size : 13mm/ 1/2";Hex Shank Size : 6.35mm/ 1/4" Overall Size : 19 x 65mm/ 0.75" x 2.5" (D*L);Color : Gray Weight : 220g Package : 5 x Hex Driver Bits