Screwdriving bits made from premium S2 steel for long tool life while driving common, mild steel screws or case hardened screws
1/4-Inch power drive shank fits all power screw guns cordless screwdrivers variable speed electric drills and quick change adapter
21 piece screwdriver bit set contains insert bits 2-#1 Philips 5-#2 Philips 2-31 square 5-#2 square 1-#4-5 slotted 3-#6-8 slotted 2-#8-10 slotted 1-#10-12 slotted 1 each T15 T20 T25 T27 T30 star dive 1-2-1/4-Inch magnetic bit holder