13/64" Thunderbolt® Black Oxide Drill Bit

The Milwaukee 48-89-2719 is a 13/64" Thunderbolt® black oxide jobber drill bit designed for general-purpose drilling in wood, metal, and plastic, commonly used for mid-size pilot holes and light fabrication work.

Key Features

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

Specs (typical)

• Size: 13/64 in
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Use: Metal, wood, PVC, plastics
• Length: Jobber length (~3-5/8")

Best Uses

• Mid-size pilot holes for bolts and screws
• General metal drilling (sheet metal, brackets, light steel)
• Wood framing and construction
• PVC and plastic work
• Everyday shop and maintenance tasks

Bottom Line

The 48-89-2719 is a standard mid-range drill bit size from Milwaukee’s Thunderbolt black oxide line. It’s not specialty (like cobalt or impact-rated)—it’s one of those “you end up using it all the time” general jobsite sizes, especially when stepping up from small pilot holes to bolt-sized holes.