The MILWAUKEE SHOCKWAVE Torx #25 1 Impact Duty Steel Screwdriver Bits are engineered to be the Most Durable, Best Fitting driver bits for the most demanding applications. The Wear Guard Tip delivers increased wear resistance which protects the fit over the life of the bit. The Shockzone is optimized for 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.