The DEWALT 7/8 in. Bi-Metal Hole Saw is built for reliable, precise perforations where durability matters. With a 7/8" diameter and a cutting depth of 1.75 inches, this hole saw covers the common hole sizes you need for electrical, plumbing, and general fabrication work, without constant tool changes.
Key details you can count on
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Diameter: 7/8 in
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Cutting depth: 1.75 in
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Material: Bi-Metal
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Brand: DeWalt
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Package contents: 1 piece
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Arbor included: No (requires a compatible arbor, not included)
Why bi-metal matters for your projects
Bi-metal construction combines a tough steel body with hardened teeth, delivering longer life and resilient performance across tougher materials. The design tolerates heat and wear better than traditional single-material hole saws, helping you maintain clean, round holes even after sustained use.
Ideal use cases
- Electrical work: create clean pass-throughs in metal studs, thin-gold steel conduit blocks, or metal enclosures.
- Metalworking and fabrication: drill through aluminum and mild steel with reduced tooth wear and smoother cut edges.
- DIY and carpentry where metal or composite materials are involved, or when deeper holes are required in a single pass.
How to use
- Mount the hole saw on a drill using a compatible arbor (not included) and ensure the bit is securely fastened.
- Mark the center of your hole and align the drill perpendicular to the workpiece for a true round hole.
- Operate at a steady, moderate speed and apply even pressure—let the teeth do the cutting to avoid binding.
- Cut to the full depth of 1.75 inches, periodically clearing chips to maintain cutting efficiency.
Practical tips for best results
- Lubricate the cut when drilling through metal to reduce heat buildup and extend blade life.
- Start with a pilot hole if your setup includes one; this helps prevent wander on thicker materials.
- For clean edges, deburr the hole after cutting and remove any burrs or sharp edges with a deburring tool.
- Store in a dry place to protect the bi-metal teeth from corrosion and maintain performance over time.
Note: Sale of this product on third-party online marketplaces is prohibited.
