2pcs of 1/2" square female adapters to 1/4" hex female adapters. Chrome vanadium steel for durability and toughness to strong impact from shock factors Quick release and safety lock design improve your work efficiency. Adapter securely holds any 1/4" hex shank bit (including insert bits). Convert any impact wrench pneumatic or powerful drill or ratchet to screwdriver with this one-piece chuck converter. Features: Quick adapter Release, hex shank adapter. Convert any air or power impact wrench to a drill or ratchet to a screwdriver with this one-piece chuck converter. Quick release converter for impact wrench. 1/2" drive to 1/4" hex converts wrench pneumatic percussion or powerful drill. Ideal for mechanics, engineers, carpenters or DIY enthusiasts. Sold by the grid cool store