Skil 3210 AA (SD1E3210AA)

The Milwaukee 7-piece Shockwave Red Helix set is engineered for extreme durability and long life. The Quad Edge tip delivers a precision start and four cutting edges to create smaller chips for faster more→removal and less heat leading to longer bit life. Designed with a Variable Helix that includes an aggressive 35 deg. helical angle, which ends at 15 deg., these tapered drill bits with Red Helix provide rapid chip removal limiting heat buildup to stay sharper longer. The bits also feature an internal Enhanced Tapered Web that greatly increases their strength, reducing premature breakage. Ideal for various applications.

Milwaukee Thunderbolt Black Oxide jobber length drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate more→strength and protect against side load breakage. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip shank holds the bit firmly in the drill chuck. The 135 degree split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Black Oxide bits require less effort to drill through metal, wood and PVC and are highly recommended for use with portable drills.

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