Zenit ZShA-1213 A Li-2B (843859)

"The Milwaukee Red Helix Cobalt 1/2"" Drill Bit are engineered for extreme durability and longer life in hard metal applications. The Milwaukee Cobalt drill bits are designed with a Variable Helix tha more→t includes an aggressive 35 degrees Helix Angle which ends at 15 degrees. The 135 degrees split point tip delivers a precision start and prevents walking for fast, accurate holes in hard metals, PVC and wood. The tapered drill bits feature a new enhanced tapered web that strengthens the bit's core to increase flute durability. The cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs. black oxide brill bits."

Greenlee Drill/Tap Bits tap holes up to 4 times faster than traditional methods.

DeWalt screwdriving bit tips are a perfect complement to your drill/driver and are designed to meet the demands of working professional contractors. Each bit is cut from shock-resistant tool steel and more→features an advanced hardening process that greatly reduces wear. Its snub-nose design fits perfectly into hex-socket adapters and the tips are precision ground to seat firmly into the screw head. The tips come in a variety of sizes and styles to accommodate all commonly available screws.