Kolner KCD 14.4MC

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.

The Milwaukee Shockwave 1 in. Slotted Impact 1/8 in. Bits are engineered to be the Most Durable, Best Fitting driver bits for the most demanding applications. The slotted bits feature Wear Guard Tip f more→or increased wear resistance which protects the fit over the life of the bit. The impact driver bits have and optimized Shockzone for each tip type and length of driver bit to absorb peak torque and prevent breaking. The Custom Alloy76 is customized and heat treated per tip type to extend the life of the driver but by up to 50X vs. competitive impact driver bits.

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