Meet the Irwin Marples 2-1/8 in. x 4 in. L Carbon Steel Forstner Drill Bit with Round Shank — a purpose-built tool for woodworkers who demand clean, precise holes as a standard, not a compromise.
Designed for durability and dependable performance, this Forstner bit is crafted from carbon steel to maintain a sharp edge through repeated use across softwoods and hardwoods alike. The 2-1/8" hole diameter is ideal for hardware mortises, hinge preparations, dowel joints, and decorative inlays, while the 4" overall length gives you solid reach and control in a variety of workpieces. The 3/8" round shank ensures a secure grip in standard drill chucks, helping you maintain true alignment and minimize slippage during cuts.
Key specifications
- Drill size: 2-1/8"
- Overall length: 4"
- Shank diameter: 3/8"
- Shank type: Round shank
- Brand: Irwin • Sub-brand: Marples
- Packaging: Boxed • Quantity: 1
- Product type: Forstner drill bit
What makes this bit essential
- Creates clean, flat-bottom holes with minimal tear-out, making it ideal for precise joinery, hardware installation, and decorative work.
- Carbon steel construction delivers reliable durability for repeated use in a variety of wood species.
- Round shank provides consistent engagement with your drill chuck, helping you maintain steady, accurate cuts.
- Packaged in a sturdy box to protect the cutting edge during storage and transport.
Who should use it
Perfect for woodworkers, cabinet makers, hobbyists, and DIY enthusiasts who require repeatable, high-quality holes for hinge mortises, dowel joints, or inlays. Use this bit with a drill press for maximum precision, or in a steady hand drill at controlled speeds to minimize tear-out and maximize edge quality.
Practical tips and use cases
- Secure your workpiece with clamps and use a scrap backing behind the cut to reduce tear-out on the exit side.
- Start at a slow speed and apply steady pressure to maintain a clean entry and true bore alignment.
- Pair with a center pilot or pilot hole if starting in particularly hard or dense wood to guide the bit and prevent wander.
- Ideal applications: hinge mortises for doors and cabinets, dowel joinery, and clean, decorative holes for inlays or hardware installation.
Note: This product is sold as a single bit and is part of the Irwin Marples line. Vendor Internet Sales Policy restricts certain marketplace listings without direct written authorization.
