DeWALT DCD777S2T

The Milwaukee Shockwave Torx T15 2 in. Impact Duty Steel Torx Bits are engineered to be the most durable, best fitting driver bits on the market. The Wear Guard Tip delivers increased wear resistance more→which protects the fit over the life of the bit. The Shockzone is optimized for each tip type and length of driver bit to absorb peak torque and prevent breaking. The Custom Alloy76 has a customized steel and heat treatment per tip type to extend the life of the driver bits, providing up to 50X life vs. competitive impact driver bits. The Shockwave driver bits are built to deliver extreme durability for the most demanding applications.

"Makita Impact XPS is new innovation in fastening with insert bits and fastening accessories built for the demands of the professional contractor. The Impact XPS Power Bits are designed exclusively fo more→r use with high-torque impact drivers and are engineered to last up to 90-times longer than standard bits. High-strength steel delivers longer bit life and the precision-fit tip is engineered to prevent ""cam-out"" and stripping. The torsion section of the bit flexes under load to take pressure off of the bit tip for increased durability. The high quality steel construction is engineered for increased durability and features a matte nickel surface for best in class corrosion resistance. Impact XPS …

IRWIN Silver and Deming High Speed Steel Fractional Bit is constructed of M-7 high speed steel for high resistance to abrasion during tough drilling applications