Studio shot of the Diablo 2-1/8 inch high speed steel Forstner bit standing upright, showcasing the 3/8 inch round shank, double-ground serrated rim, and sharp center spur.
Retail packaging for the Diablo 2-1/8 inch Forstner bit, featuring a clear blister pack displaying the tool alongside diagrams for flat bottom holes and fast clean holes.
Studio shot of the Diablo 2-1/8 inch high speed steel Forstner bit standing upright, showcasing the 3/8 inch round shank, double-ground serrated rim, and sharp center spur.
Retail packaging for the Diablo 2-1/8 inch Forstner bit, featuring a clear blister pack displaying the tool alongside diagrams for flat bottom holes and fast clean holes.
DIABLO

Diablo Forstner Drill Bit FB-016 2-1/8 Inch Forged High Speed Steel (3/8 Round Shank Serrated Edge Flat Bottom Overlapping Wood Joint Boring Tool)

Only 3 left
SKU: FB-016
$17.69 USD

Description

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High-Density 2-1/8 Inch Forged High Speed Steel Forstner Drill Bit with Serrated Edge Technology

The Diablo FB-016 2-1/8 Inch Forged High Speed Steel Forstner Drill Bit delivers an industrial architectural joinery solution engineered to bore clean, flat-bottomed apertures and continuous overlapping channels across premium timber stocks. Forged from premium high-speed steel and hardened to resist intense friction heat, this heavy-duty cutting bit utilizes double-ground serrated border edges to slice through tough fibers cleanly and eliminate wood splintering. The system integrates a robust 3/8-inch round shank compatible with stationary drill presses or handheld drills, featuring an ultra-sharp geometric center spur that pilots the assembly directly into position to stop bit walking during complex angled pocket hole execution.

Best Used For:

  • Concealed Hinge Boring: Machining precise, clean 2-1/8 inch flat-bottomed blind holes for European-style cabinet hinges inside dense composite panels.
  • Overlapping Mortise Arrays: Pocket-drilling a series of interlocking circular cuts to rough out large structural mortise and tenon joints in furniture framing.
  • Angled Pocket Pocket-Boring: Driving clean structural connection pathways at geometric angles into thick hardwoods without grain blowout.

Key Performance & Safety Features

  • Serrated Edge Geometry: Double-ground micro-teeth score the outer perimeter circle before material removal to suppress surface veneer tearing.
  • Forged Structural Core: Drop-forged tool configuration outlasts standard cast steel bits to sustain optimal dimensional profile accuracy.
  • Anti-Walk Center Pilot: Extended sharp center brad spur locks the mechanical rotation axis onto target markers to ensure straight starts.
  • Multi-Timber Compatibility: Engineered to cut smoothly through hard maple, structural pine, finish plywood layers, and high-density fiberboards.
  • 3/8 Inch Precision Shank: Milled round shaft profile clamps securely within standard multi-jaw drill chuck platforms to mitigate slippage.

What's Included

  • (1) Diablo 2-1/8" High Speed Steel Forstner Bit (FB-016)

Technical Specifications

Brand Name Diablo Tools
Model Number FB-016
Tool Classification High Speed Steel Forstner Drill Bit
Cutting Diameter Profile 2.125 in. (2-1/8 in.)
Overall Tool Length 3.50 in. (3-1/2 in.)
Shank Size Track 0.375 in. (3/8 in.)
Shank Mechanical Profile Round Straight Shaft
Bit Core Metallurgy Forged Hardened High Speed Steel (HSS)
Cutting Edge Architecture Double-Ground Serrated Rim
Softwood Speed Velocity Max 500 RPM Spectrum
Material Applications Wood, Plywood, Medium-Density Fiberboard (MDF)
Pack Quantity 1 Unit

Pro-Tip: When cutting blind flat-bottomed hinge pockets in abrasive particleboards or oak veneers, dial your tool rotation down to match the recommended 500 RPM spectrum. Operating within this speed ceiling keeps wood shaving flow steady and guards the serrated high speed steel edges from blunting due to thermal accumulation.