29PC THUNDERBOLT® Black Oxide Drill Bit Set

The Milwaukee 48-89-2801 is a 21-piece Thunderbolt® black oxide drill bit set designed for general-purpose drilling in metal, wood, and plastic. It’s one of Milwaukee’s smaller full kits in the Thunderbolt lineup, focused on everyday jobsite drilling and durability.

Key Features

• 135° split point tips – start on contact and reduce walking for accurate holes
• Black oxide coating – reduces friction and helps prevent corrosion
• Thicker reinforced web (Thunderbolt design) – improves strength and reduces breakage
• Parabolic flutes – clear chips quickly to keep bits cooler and cutting faster
• 3-flat Secure-Grip shank – prevents slipping in the drill chuck

What’s included

This set typically covers common sizes from small pilot bits up to 3/8" range, including duplicates of frequently used sizes (like 1/8", 3/16", 1/4") for jobsite convenience.

Best Uses

• General construction drilling
• Wood framing and fastening
• Light steel and metal fabrication
• Shop and maintenance work
• Everyday “grab-and-go” drill set for most materials

Bottom Line

The 48-89-2801 is a basic but durable all-purpose drill bit set. It’s not specialty (like cobalt, step bits, or long aircraft bits)—it’s meant to be your standard everyday Milwaukee twist-bit kit for most common drilling jobs.