Impact Drill 1/4"x3/8" Hex Quick Change Chuck Socket Adapter Set 5Pcs Product Name : Chuck Socket Adapter;Material : Chrome Vanadium Steel Hex Socket Opposite Sides Distance : 9.5mm / 3/8";Hex Shank Opposite Sides Distance : 6.3mm/ 1/4" Total Length : 51mm / 2";Color : Gray Weight : 109g Package : 5Pcs x Chuck Socket Adapter