Achieve precision woodwork with the Irwin Marples 1-7/8 in. x 4 in. L Carbon Steel Forstner Drill Bit with a round shank. Designed for clean, flat-bottom holes in hard and soft woods, this bit delivers dependable performance for cabinetry, furniture making, and detailed joinery projects.
-
Diameter: 1-7/8 in
-
Overall length: 4 in
-
Shank: 3/8 in round shank
-
Material: Carbon steel
-
Type: Forstner drill bit
-
Brand/Line: Irwin Marples
-
Packaging: Boxed; 1 piece per package
What makes this Forstner bit stand out
Forstner bits are prized for creating precise, flat-bottom holes with smooth sidewalls. This Irwin Marples model combines robust carbon steel with a dependable cutting edge to reduce tearing and wandering, giving you cleaner results with every hole. The round 3/8 in shank fits a wide range of standard drill chucks and drill presses, providing stable, precise guidance even when you’re drilling larger-diameter holes.
Ideal use cases
- Hinge mortises and dowel work in cabinetry and furniture projects
- Creating clean recesses for inlays or rounded recesses for electrical pass-throughs
- Drilling wide, flat-bottom holes in softwoods and hardwoods without tearout
- Controlled material removal in joinery tasks where square edges are essential
How this bit helps you work smarter
- Flat-bottom holes: achieve precise depth for hardware installation, without the need for extra routing steps.
- Cleaner edges: the Bit’s geometry minimizes tearout, especially beneficial on plywood veneers and fine hardwoods.
- Versatile mounting: the 3/8 in round shank works with most standard drills and drill presses, offering reliable compatibility across tools.
- Durable construction: carbon steel delivers steady cutting performance for repetitive woodworking tasks.
Practical tips for best results
- Mark the depth with a stop or tape to prevent over-penetration and ensure consistent holes.
- Secure the workpiece with clamps and feed the bit slowly to maintain control and minimize tearout.
- Start with a pilot guide if drilling through dense lumber to reduce wandering.
- Keep chips cleared during drilling to avoid overheating; consider backing material if drilling near the surface.
- After use, wipe the bit and lightly oil before storing in the boxed case to prevent rust on carbon steel.
Care and longevity
Store this bit in its boxed packaging to protect the cutting edge and maintain alignment. Regular maintenance—removing built-up pitch, keeping it dry, and applying a light coat of oil—helps preserve sharpness and extend the bit’s life for many projects to come.
Who this is for
Perfect for woodworkers, hobbyists, and professionals who value clean, repeatable holes without extra finishing. If you’re upgrading your workshop with reliable, purpose-built bits for cabinetry, furniture making, or detailed wood joinery, this Irwin Marples Forstner bit is a dependable choice.
