1/4" Thunderbolt® Black Oxide Drill Bit

The Milwaukee 48-89-2722 is a 1/4" Thunderbolt® black oxide drill bit designed for general-purpose drilling in metal, wood, and plastic, and it’s one of the most commonly used “standard size” bits in Milwaukee’s lineup.

Key Features

• Black Oxide Coating – Reduces friction and adds corrosion resistance for longer life
• 135° Split Point Tip – Starts on contact and prevents walking for accurate drilling
• Thunderbolt Web Design – Thicker core increases strength and reduces breakage under side load
• Parabolic Flutes – Clears chips quickly to keep drilling cooler and faster
• 3-Flat Secure-Grip Shank – Helps prevent slipping in the drill chuck

Specs (typical)

• Size: 1/4 in
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Use: Metal, wood, PVC, plastic
• Length: Jobber length (~4")

Best Uses

• Bolts and anchor pilot holes
• General construction drilling
• Sheet metal and light steel
• Wood framing and assembly work
• Everyday shop use