13/32" Thunderbolt® Black Oxide Drill Bit

The Milwaukee 48-89-2732 is a 13/32" Thunderbolt® black oxide jobber drill bit used for general-purpose drilling in wood, metal, and plastic. It’s one of the larger standard sizes in the Thunderbolt lineup and is commonly used in construction and fabrication work.

Key Features

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

Specs

• Size: 13/32 in (0.4063")
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Length: ~5-1/4" jobber length
• Use: Metal, wood, PVC, plastics

Best Uses

• Large bolt and anchor holes
• Structural metal fabrication
• Construction framing and heavy assembly
• Sheet metal and light steel drilling
• General jobsite drilling

Bottom Line

The 48-89-2732 is a large standard “workhorse” drill bit, not a specialty cobalt or impact-rated bit. It’s designed for reliable everyday drilling when you need a clean 13/32" hole in common materials.