This Versatile Adapter Allows You To Easily Convert A 1/2" Square Drive Into A 1/4" Hex Shank, Making It Ideal For Use With Screwdriver Bits, Drill Bits, And Other Hex Accessories. 1/2" Square To 1/4" Hex Socket Adapter For Impact Driver | Ratchet Wrench Converter Heavy Duty Drill Bit Holder.