3pcs/set Wrench Sleeve Extension Bar Hex Shank Drive Power Drill Bit Socket Driver Adapter 1/4 3/8 1/2& 50mm Long

Size: inch Length 1/4''*1/4''*50mm--1/4'' shank can be converted into 6.35 mm square 3/8''*1/4''*50mm--1/4'' shank can be converted into 9.53 mm square 1/2''*1/4''*50mm--1/4'' shank can be converted into 12.7 mm square Material: Chrome vanadium steel cr-v Quantity: 1 set(3pcs)