1/2 Inch Drive x 18 mm Hex Impact Bit Socket BoltsandNuts.com and square insulated drivers

and square insulated drivers

The double box ends are the same size and both are 12-point

Part Number: M8C16ASBA2

Shank Type: 3-Flat

Part Number: BIT-DEWSFC3/8-120

1/2 Inch Drive x 18 mm Hex Impact Bit Socket BoltsandNuts.com and square insulated driversSize is marked both with a high visibility laser marking and a permanent stamped marking that won't wear off 6 sided hexagonal S2 steel bit tip is machined to precise tolerances for an exact fit with hex fasteners Two piece design allows bit and socket to be optimized separately, for a more durable tool than traditional one piece designs Drive end is made of 4140 chromium molybdenum (Cr Mo) steel and properly heat treated for use on impact wrenches