The DEWALT DWA1SP4IRB FlexTorq 1" Spanner #4 IMPACT READY Bits are CNC machined, resulting in accurate manufacturing for optimal fit into the screw recess. A reflex core allows 2" bits to flex up to 15-degrees to reduce breakage. These bits are a part of the 10X Magnetic Screw Lock System for fastener retention which minimizes drops and reduces wobbling. Impact ready bits with FlexTorq have increased durability for longer life. This is a bulk pack of 50 bits.