Power Drill 1/4-inch Shank 1/2-inch Impact Driver Socket Adapter 2 Pcs Product Name : Socket Adapter;Material : Chrome Vanadium Steel Hex Socket Size : 12.5mm / 1/2";Hex Shank Size : 6.3mm/ 1/4" Overall Size : 16x 73mm/ 0.6" x 2.9" (D*L);Color : Gray Weight : 67g Package : 2 x Socket Adapter