Uxcell Square Driver Hex Power Drill Bit Socket Adapter (8 Piece), 1/4", 3/8", 1/2" Product Name: Hex Power Drill Socket; Net Weight: 177g Package Content: 8in1 x Hex Power Drill Socket; Material: Chrome Vanadium Steel Color: Gray Hex Shank Size: 6.3mm/ 1/4" Square Drive Size: 12.7mm/ 1/2", 9.53mm/ 3/8", 6.3mm/ 1/4"