Screwdriving bits made from premium S2 steel for long tool like while driving common or mild steel screws or case hardened screws. 1/4" power drive shank fits all power screw guns, cordless screwdrivers, variable speed electric drills and quick change adapter.
Century's Caliber Extra Hard screwdriving bits are cut from high grade, shock absorbing alloy steel. Individually heat treated to guarantee an optimal harndess for wear resistance and less tip breakage.