uxcell&reg; 3 Pcs Impact Driver/Drill Socket Adapter Set 1/4" Hex Shank to 1/2" UXCELL (U excel !) is the sole authorized Seller of uxcell products Product Name : Socket Adapter;Material : Chrome Vanadium Steel;Hex Socket Size : 12.5mm / 1/2";Hex Shank Size : 6.3mm/ 1/4" Overall Size : 12.5 x 51mm/ 0.5" x 2" (D*L);Color : Gray Weight : 112g Package : 3 x Socket Adapter