Irwin Marples 7/8 in. x 4 in. Forstner Drill Bit with Round Shank is built for woodworkers who demand clean, precise, flat-bottom holes without wandering or tearing out. Crafted from durable carbon steel, this bit is designed to hold its edge under heavy use and deliver consistent results in both softwoods and hardwoods.
Why choose this Forstner bit? It combines a generous 7/8 inch cutting diameter with a compact 4 inch overall length, giving you the control and depth you need for a wide range of furniture and cabinetry projects. The round shank fits securely in standard drill chucks, making it versatile for use in drill presses or handheld drills alike. This single-piece bit ships boxed for protection and easy storage, ensuring you always have your go-to tool ready when precision matters most.
Key specifications
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Drill size: 7/8 in
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Overall length: 4 in
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Shank diameter: 3/8 in
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Shank type: Round Shank
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Material: Carbon steel
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Package: 1 piece, boxed
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Brand: Irwin Marples
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Product type: Forstner drill bit
Ideal use cases
Forstner bits excel at creating clean, flat-bottom holes, ideal for precise through-holes in cabinetry, face frames, and hinge recesses. Use the 7/8 in size when you need a larger bore for dowels, hardware recesses, or decorative inlays. The 4 inch length provides deeper access in thicker stock, so you can drill accurately without repositioning your workpiece. Whether you’re building a new bookshelf, installing concealed hinges, or prepping a tabletop, this bit helps you achieve professional-grade results with minimal tear-out.
What sets this apart
Unlike generic bits, the Irwin Marples line is synonymous with woodworking precision. The carbon steel construction delivers reliable edge retention and steady performance across multiple projects. The round shank ensures smooth, stable operation in standard chucks, reducing wobble and improving hole consistency. Boxed packaging keeps the bit protected from nicks and moisture between uses, so it stays ready for the next precise cut.
Practical tips
- Clamp workpieces securely and use a slow, steady feed to maximize edge quality.
- Pair with a drill press when possible for perfectly perpendicular holes and repeatable results.
- Keep the bit clean and dry after use to extend cutting life; wipe away dust and debris before storage.
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