The Diablo 1 1/8" Forstner Bit for Wood is a high-speed steel drilling tool engineered for clean, precise flat-bottom holes in hardwoods, softwoods, veneered plywood, and MDF. Designed for use with a drill press or handheld drill, this 3 1/2" long bit with a 3/8" shank delivers straight, angled, and overlapping holes with minimal splintering - making it a reliable choice for woodworking, cabinetry, pocket holes, and joinery work. Manufactured in Austria from forged hardened steel, this bit is built for lasting performance and consistent results across a wide range of wood drilling applications.

Key Features

• Double-ground serrated edge - reduces splintering and chipping for cleaner hole edges in finished and raw wood surfaces
• Forged hardened steel body construction - delivers a longer bit life and a sharper, more durable cutting edge compared to non-forged alternatives
• Ultra-sharp spur tip - keeps the bit centered at the start of the cut, preventing walking on the material surface for accurate hole placement
• Drills straight, angled, and overlapping holes - gives woodworkers the flexibility to tackle a wide variety of joinery and through-hole drilling tasks
• 3/8" shank - compatible with any drill chuck rated 3/8" or larger, fitting a broad range of drill presses and handheld drills
• 1 1/8" cutting diameter - sized for pocket holes, shelf pin holes, and other common flat-bottom boring applications in wood

Why This Product

• The double-ground serrated cutting edge minimizes tear-out when drilling through veneered plywood and MDF, where a cleaner exit hole matters for finished work
• Forged hardened steel construction means the bit holds its edge through repeated use in both hardwoods and softwoods, reducing the need for frequent sharpening or replacement
• The ultra-sharp center spur eliminates bit walk at the start of a bore, which is critical when working with angled or overlapping hole layouts where precise positioning is essential
• At 3 1/2" overall length with a 3/8" shank, this bit works with both bench-mounted drill presses and handheld drills, making it a practical single-bit solution for flat-bottom hole drilling across multiple project types

Specifications

• Brand: Diablo
• Manufacturer Part Number: FB-008
• Product Group: Forstner Bits
• Category: Individual Bits
• Diameter: 1 1/8"
• Length: 3 1/2"
• Shank: 3/8"
• Compatible Tools: Drill Press; Hand Held Drill
• Compatible Materials: Hardwoods; Softwoods; Veneered Plywood; MDF
• Pack Quantity: 1
• Country of Origin: Austria

Approved Applications

• Drilling flat-bottom holes in wood - ideal for shelf pin holes, hardware recesses, and dowel pockets
• Pocket hole drilling - creates clean, precise entry points for pocket joinery in hardwoods and softwoods
• Overlapping hole layouts - the bit geometry supports side-by-side and overlapping bore patterns for mortise and irregular cutout work
• Drilling in plywoods, hardwoods, and softwoods - versatile across common lumber and sheet goods used in furniture and cabinetry

Frequently Asked Questions

What is the minimum chuck size required for this Forstner bit?

This bit requires a minimum chuck size of 3/8". It is compatible with both drill presses and handheld drills equipped with a 3/8" or larger chuck.

Can this bit be used to drill overlapping holes?

Yes. The Diablo 1 1/8" Forstner bit is specifically designed to drill straight, angled, and overlapping holes, making it suitable for mortise work and other applications that require adjacent or intersecting bores in wood.

What types of wood materials can this Forstner bit handle?

This bit is approved for use in hardwoods, softwoods, veneered plywood, and MDF. Its double-ground serrated edge helps minimize splintering and chipping across all of these material types.

What makes this bit suitable for drilling flat-bottom holes?

Forstner bit geometry - with a center spur and rim cutters - is specifically designed to produce flat-bottom holes rather than the tapered bottom left by a standard twist drill. The ultra-sharp spur on this Diablo bit also keeps the cut centered and prevents the bit from walking at the start of the bore.