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Forstner Drill Bits 40mm (1-9/16 inch) Tungsten Carbide Upgraded Version 3-Cutter Higher Hardness Wood Hole Saw Auger Opener Woodworking Drilling Tool Wood Cutter 40mm (1-9/16 inch) 3-Cutter

What people love (and don’t love)

What people love

  • Extremely sharp tungsten carbide blades provide clean, smooth holes with minimal splintering.
  • Solid steel reinforced construction ensures durability and long-lasting performance.
  • Works well on various materials including wood, decal-covered wood, and plastics without damaging surfaces.
  • Hex shank design fits securely in compatible drill chucks, reducing bit slippage.
  • Fast cutting speeds and minimal burning during use.
  • Highly recommended for woodworking projects like table dog holes and tea-light holders.

What people don’t love

  • Hex shank may not fit standard round drill bit extensions, requiring compatible hex chuck tools.
  • Metric size markings on the shank may confuse users accustomed to imperial measurements.
  • Some customers experienced measurement misunderstandings resulting in returns.

Sharp, durable Forstner drill bit ideal for precise woodworking but requires compatible hex shank drill chucks.

Summary based on customer review evidence.

Quick facts

  • Brand: STORMCUBE
  • Price: USD 14.99
  • Rating: 4.50 (315 reviews)

If you need a clean 40mm (1-9/16 inch) hole in wood for cabinetry, furniture builds, or shop jigs, the STORMCUBE 3-cutter Forstner bit is designed to cut smoothly with reduced burrs—even when working end grain or drilling through knots.

The cutting edge is made from three pieces of K35 monolithic tungsten carbide (listed hardness ≄91HRA) and is resharpenable to help extend service life. An arc-curve head design is intended to clear sawdust faster for more efficient drilling.

Important use notes: This bit is for wood only (not for metal). Secure the workpiece, keep the bit perpendicular, start at a slow speed until fully located, then increase speed. The manufacturer also recommends injecting water when processing hardwood to improve drilling accuracy and quality.

  • 3-cutter design for faster cutting and longer service life vs. 2-cutter bits, with smooth hole results
  • K35 monolithic tungsten carbide cutting edge (≄91HRA listed) that’s resharpenable for extended use
  • Arc-curve head designed to remove sawdust faster for more efficient drilling
  • 40mm cutting diameter with 9mm straight shank; 60mm drilling depth; 90mm total length
  • Wood-only bit—follow recommended drilling technique for best results (slow start, secure material, perpendicular entry)