DEWALT ACCESSORIES DWA3PH2IR Impact #2 Phil 3-1/2" Bit Impact ready bits with FlexTorq have increased durability for long life CNC machined resulting in accurate manufacturing for optimal fit into screw Recess Reflex core allows 2" bits flex up to 15 to reduce breakage Part of 10x magnetic screw lock system for fastener retention which minimizes drops and reduces wobbing