11/64" Thunderbolt® Black Oxide Drill Bit

The Milwaukee 48-89-2717 is an 11/64" Thunderbolt® black oxide drill bit used for general-purpose drilling in metal, wood, and plastic. It’s a common mid-size bit often found in Milwaukee drill bit sets.

Key Features

• Black Oxide Coating – Reduces friction and helps resist corrosion 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 Flute Design – Clears chips quickly to keep drilling cooler and faster
• Secure-Grip Shank (3-flat style) – Helps reduce slipping in the chuck

Specs (typical)

• Size: 11/64 in
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Use: Metal, wood, PVC, plastics
• Length: ~3-1/4 in jobber length

Best Uses

• Pilot holes and general drilling
• Light to moderate metal drilling
• Wood framing and construction
• Plastic/PVC work
• Everyday shop use

Bottom Line

The 48-89-2717 is just a standard mid-size “workhorse” drill bit in Milwaukee’s Thunderbolt line. It’s not specialized (like cobalt or impact-rated bits)—it’s meant for general drilling tasks you run into constantly on job sites or DIY work.