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Milwaukee Cobalt Red Helix drill bits are engineered for extreme durability and long life in hard metal applications. The Milwaukee cobalt drill bits are designed with a Variable Helix that includes a more→n aggressive 35-degree Helix Angle which ends at 15 degrees. The drill bits have Quadedge Tip to decrease heat buildup and drill faster. The 135-degree split point tip delivers a precision start and prevents walking for fast, accurate holes in hard metal, PVC, and wood. The tapered drill bits feature a new Enhanced Tapered Web that strengthens the bit's core to increase flute durability.

Milwaukee Thunderbolt pilot bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard pilot bit, which provides ultimate strength and protects more→against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A precision start, 135 deg. split point tip starts on contact to keep the bit from walking for fast, accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.

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