9/32" Thunderbolt® Black Oxide Drill Bit (6 PK)

The Milwaukee 48-89-2834 is a 9/32" Thunderbolt® black oxide drill bit set (6-pack) designed for general-purpose drilling in metal, wood, and plastic.

It’s part of Milwaukee’s Thunderbolt jobber-length series, built for strength, durability, and consistent everyday performance.

Key Features

• 135° split point tip – starts on contact and prevents walking for accurate holes
• Thunderbolt reinforced web – thicker core increases strength and reduces breakage
• Black oxide coating – reduces friction and resists corrosion
• Parabolic flute design – clears chips quickly for faster, cooler drilling
• 3-flat Secure-Grip shank – helps prevent slipping in the chuck

Specs

• Size: 9/32 in (0.2813")
• Quantity: 6 bits per pack
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Overall length: ~4-1/4 in (jobber length)
• Flute length: ~2-15/16 in
• Use: Metal, wood, PVC, plastics

Best Uses

• Drilling holes for 5/16" hardware clearance (approx.)
• General construction and framing
• Medium-duty metal drilling
• Woodworking and shop use
• Maintenance and repair tasks

Bottom Line

The 48-89-2834 sits just above the common 1/4" size, making it a useful mid-range drill bit for slightly larger fasteners and clearance holes. Like the rest of the Thunderbolt line, it’s a durable, everyday workhorse, not a specialty bit for deep reach or oversized drilling.