Crown CT21081HQ-4 BMC

The Milwaukee Shockwave T20/T25 Impact Double Ended Bits are engineered to be the most durable, best fitting driver bits for the most demanding applications. Each Double Ended Driver Bit features Wear more→Guard Tip for increased wear resistance which protects the fit over the life of the bit. Milwaukee double ended bits have Shockzones optimized for each tip type and length to absorb peak torque and prevent breaking. Precise custom machined driver bit tips prevents stripping and reduces wobble providing extreme durability for the most demanding applications. The T20/T25 impact double ended driver bit is made from Custom Alloy76 Steel to extend the life of the driver bits.

IRWIN Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits

While most screw driving bits are simply compatible with impact drills and drivers, Irwin Impact Performance Series fastener drive bits are engineered for maximum durability and long life with impact more→drivers. These bits are forged rather than milled, so they fit fasteners more precisely, which reduces stripping and increases the life of the bit itself - Irwin's Impact Performance Series bits have three times longer life than traditional bits.