When you’re drilling through metal, you need a bit that stays true from start to finish. The Diablo Metal Demon 9/32 in. x 4.3 in. L Metal Drill Bit with a 3-Flat Shank is built to deliver clean holes in steel, aluminum, brass, and other metals—with dependable accuracy you can feel project after project.
Key details
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Drill size: 9/32 in.
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Overall length: 4.3 in.
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Flute length: 2.7 in.
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Shank type: 3-Flat Shank
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Material: Metal
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Brand: Diablo (Metal Demon line)
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Packaging: Bulk; 1 drill bit per package
Why the 3-flat shank matters
- The 3-flat shank design locks into the chuck to minimize slipping and wobble, giving you steadier starts and straighter holes in metal fasteners, fixtures, and assemblies.
- Enhanced torque transfer translates to more consistent hole quality and reduced bit wandering, even when you’re working in cramped spaces or with thick stock.
- Compatibility with standard 3-flat chucks makes this bit a reliable addition to either handheld drills or drill presses, helping you tackle metalworking tasks with confidence.
Ideal use cases
- Drilling precise holes in steel plates, aluminum extrusions, and cast iron components for fabrication, repairs, and DIY projects.
- Creating pilot holes for larger-diameter metal drill bits, reducing breakout and ensuring cleaner holes.
- Prototyping and light production work in garages, workshops, and machine shops where dependable performance matters.
How to use for best results
- Secure your workpiece with clamps or a vise to prevent movement.
- Apply a light coat of cutting oil or lubricant to reduce heat and extend bit life.
- Start with a small pilot hole if drilling thick or hard material to improve accuracy and reduce walking.
- Feed steadily and avoid the bit binding in the material; back off if you notice excessive heat or smoke, then resume with lighter pressure.
Care and longevity
- Keep the bit clean and dry after use to prevent corrosion and maintain grip integrity in the shank.
- Avoid overheating by using appropriate cutting speeds for the material and maintaining sharpness through regular inspection.
- Store in a dry place or in a dedicated drill bit assortment to prevent nicks and dulling.
Who this is for
- Hobbyists, fabricators, and professionals who regularly drill metal and need reliable, precise results.
- Anyone seeking a single, dependable metal-dedicated drill bit that performs consistently across steel, aluminum, and other metals.
Choose the Diablo Metal Demon 9/32 in. x 4.3 in. L Metal Drill Bit with a 3-Flat Shank for durable metal drilling that starts true, stays true, and helps you finish with clean, accurate holes—project after project.
