1" S&D Black Oxide Drill Bit

The Milwaukee 48-89-2754 is a 1" Silver & Deming (S&D) black oxide drill bit, designed for very large, heavy-duty drilling applications in metal, wood, and plastic.

It’s the largest bit in the 48-89-27xx series you’ve been listing, and it uses a reduced 1/2" shank so it can still run in a standard drill.

Key Features

• 135° split point tip – starts on contact and prevents walking for accurate drilling
• Black oxide coating – reduces friction and improves corrosion resistance
• Parabolic flute design – clears chips quickly for faster drilling and less heat buildup
• 1/2" reduced shank (3-flat Secure-Grip) – prevents slipping in the chuck and fits standard drills
• Heavy-duty web construction – adds strength for large-diameter drilling

Specs

• Size: 1 in
• Shank: 1/2" reduced (S&D style)
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Overall length: ~6 in
• Use: Metal, wood, PVC, plastics

Best Uses

• Maximum-size structural bolt holes
• Steel fabrication and heavy construction
• Thick timber / beam drilling
• HVAC, plumbing, and mechanical installs
• Any application requiring 1" diameter holes with a standard drill

Bottom Line

The 48-89-2754 is the top end of Milwaukee’s S&D drill bit range—a heavy-duty, large-hole bit that still fits a regular drill thanks to its reduced shank design. It’s strictly for industrial-scale hole drilling, not precision or light-duty work.