The Irwin Marples 1-5/8 in x 4 in Carbon Steel Forstner Drill Bit with Round Shank is purpose-built for woodworkers who demand precise, clean holes. This dedicated Forstner bit delivers flat-bottom recesses and crisp edges, making it ideal for cabinetry, furniture construction, and detailed joinery where accuracy matters.
-
Diameter / drill size: 1-5/8 in
-
Overall length: 4 in
-
Shank diameter: 3/8 in
-
Shank type: Round
-
Material: Carbon steel
-
Packaging: Boxed, 1 piece
-
Brand: Irwin (Marples)
What sets this bit apart is its ability to produce controlled, high-clarity holes that are ready for hinges, dowels, or cable routing without excessive tear-out. The 4-inch overall length provides reach for deeper stock or through-work, while the round 3/8-inch shank ensures compatibility with standard drill chucks for stable, confident operation.
Ideal use scenarios include hinge mortises in cabinet doors, large-diameter bore passes for hardware installation, and precise dowel or bore work in both hardwoods and softwoods. Whether you’re upgrading a professional workshop or tackling a home project, this Forstner bit from the Marples line offers dependable performance when accuracy is non-negotiable.
Practical tips for best results: secure your workpiece, use steady feed with moderate speed, and periodically clear chips to maintain clean cuts and extend bit life. With proper care, this carbon steel bit remains a reliable workhorse in your drilling toolkit for years to come.
