Best Irwin Tools Forstner Drill Bits in 2026

①Specifications: 16 PCS includes 1/4" (6.3mm), 3/8" (9.5mm), 1/2" (12.7mm), 5/8" (15.8mm), 3/4" (19.0mm), 7/8" (22.2mm), 1" (25.4mm), 1-1/8" (28.5mm), 1-1/4" (31.7mm), 1-3/8" (34.9mm) ，1-1/2（38.1mm), 1-5/8(41.28mm), 1-3/4(44.45mm), 1-7/8(47.63mm), 2(50.8mm) and 2-1/8(53.98mm) forstner bits

②Features: Hex Shank is easy to install and tighten ,prevent the bit from slipping. Extra sharp cutting spurs is especially designed for cutting through hard and soft wood or other materials smoothly and efficiently.

③Great Performance: Easily make flat-bottomed and pocket holes with no chipping on any wood or wood products, plastic, polywood and other materials during processing or installation.

Extends any Forstner shank bit an additional 4 inches, Swift Bore (Registered Trademark)

Ideal for use with any 3/8" shank bit

High-carbon steel construction, precision ground and polished

Drilling with forstner bits to achieve a flat bottom hole or to start a deep hole turning project like a large vase or vessel can be very challenging with a standard length forstner bit. Worse yet, even with a standard length extension you’ll probably only add about 3” of depth to your bit. This is often not enough of a depth for many of your projects and it can get quite frustrating without the proper tools.

With the 10” long forstner bit extension you can now add over 8” of extra drilling depth to your current forstner bits! That alone makes this extension especially ideal for woodturners when having to hollow out large vessels or objects like salt and pepper shakers. The extension also works great for rustic furniture, joining wide timbers, wooden beverage mugs and even works great on things like turned kaleidoscopes.

Can be used with hand drill as well. The 10” Forstner Bit Extensions are made from heavy duty solid machined steel and feature a 3/16” thick socket wall to firmly hold the bits in place. The bits are secured with two hex socket set screws using a hex key wrench which is included. The extensions will work with hex shank or round shank forstner bits.

Forstner Drill Bit: Drilling diameter: 80mm / 3.15"; shank size: 10mm / 0.39"; drilling depth: 54mm / 2.13"; total length: 86mm / 3.39". Thickened carbide cutter and solid hardened steel body, hex shank forstner bits for woodworking.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

Specifications: Drilling dia.: 70mm; shank size: 10mm; drilling depth: 51mm; total length: 85mm. Hex shank, cemented carbide cutter and solid hardened steel body.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

【Top Quality】Made from high quality Tungsten Carbide Tipped Cutters, solid hardened steel body, ensuring its high hardness, rust proof, sturdy and durable；

【Size】Drilling diameter: 3Inch (76mm), Hex Shank Dia.: 2/5Inch(10mm) , Drilling depth: 2-3/8Inch(60mm), Total length: 3-9/16Inch (90mm).

【 Sharp & Clean Holes】This TCT (Tungsten Carbide Tipped Cutters)Forstner bit set perfect for hard wood, can drill precise flat bottom holes with no chipping in Hard Wood or soft wood.(drilling depth up to 2-3/8Inch)

Specifications: Drilling dia.: 75mm; shank size: 10mm; drilling depth: 54mm; total length: 86mm. Hex shank, cemented carbide cutter and solid hardened steel body.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

【Top Quality】Made from high quality Tungsten Carbide Tipped Cutters, solid hardened steel body, ensuring its high hardness, rust proof, sturdy and durable；

【Size】Drilling diameter: 4Inch , Hex Shank Dia.: 2/5Inch(10mm) , Drilling depth: 2-3/8Inch(60mm), Total length: 3-9/16Inch (90mm).

【 Sharp & Clean Holes】This TCT (Tungsten Carbide Tipped Cutters)Forstner bit set perfect for hard wood, can drill precise flat bottom holes with no chipping in Hard Wood or soft wood.(drilling depth up to 2-3/8Inch)

【Top Quality】Made from high quality Tungsten Carbide Tipped Cutters, solid hardened steel body, ensuring its high hardness, rust proof, sturdy and durable；

【Size】Drilling diameter：1-3/8Inch, 1-9/16Inch, 1-3/4Inch, 2Inch, 2-3/8Inch, 2-3/4Inch, Hex Shank Dia.: 3/8 Inch(9.5mm) , Drilling depth: 2-3/8Inch (60mm), Total length: 3-9/16 Inch(90mm).

【 Sharp & Clean Holes】This TCT (Tungsten Carbide Tipped Cutters)Forstner bit set perfect for hard wood, can drill precise flat bottom holes with no chipping in Hard Wood or soft wood.(drilling depth up to 2-3/8Inch)

4-5/8-Inch Diameter

1/2-Inch hex shank

Adjustable tapered screw tip

✅ Specifications: 8PCS includes 1/4" (6.3mm), 3/8" (9.5mm), 1/2" (12.7mm), 5/8" (15.8mm), 3/4" (19.0mm), 7/8" (22.2mm), 1" (25.4mm), 1-3/8" (34.9mm) forstner bits

✅ Features: 3/8" Hex Shank is easy to install and tighten ,prevent the bit from slipping. Extra sharp cutting spurs is especially designed for cutting through hard and soft wood or other materials smoothly and efficiently.

✅ Great performance: Easily make flat-bottomed and pocket holes with no chipping on any wood or wood products, plastic, polywood and other materials during processing or installation.

Forstner Drill Bit: Drilling diameter: 28mm / 1.1"; shank size: 12mm / 0.47"; drilling depth: 54mm / 2.13"; total length: 88mm / 3.46". Thickened carbide cutter and solid hardened steel body, hex shank forstner bits for woodworking.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

【Top Quality】Our Forstner Drill bit made from high quality Tungsten Carbide Tipped Cutters, and solid hardened steel body, ensuring its high hardness, rust proof, sturdy and durable；

【Large Size】Drilling diameter：1-3/8Inch, 1-9/16Inch, 1-3/4Inch, 2Inch, 2-3/8Inch, 2-3/4Inch, Hex Shank Dia.: 3/8 Inch(9.5mm) , Drilling depth: 2-3/8Inch (60mm), Total length: 3-9/16 Inch(90mm).

【 Sharp & Clean Holes】This TCT (Tungsten Carbide Tipped Cutters)Forstner bit set perfect for hard wood, easily drill precise flat bottom holes with no chipping in Hard Wood or soft wood.(Drilling depth up to 2-3/8Inch)

Specifications: Drilling dia.: 50mm; shank size: 10mm; drilling depth: 48mm; total length: 80mm. Hex shank, cemented carbide cutter and solid hardened steel body.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc..

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation.

Forstner Drill Bits: Drilling diameter: 80mm / 3.15"; shank size: 9mm / 0.35"; drilling depth: 52mm / 2.05"; total length: 85mm / 3.35". Thickened and sharp carbide tip, high strength and hardness high carbon steel body, hex shank forstner bits for woodworking.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

High Quality: Forstner Drill Bit made of Tungsten carbide with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Cutting Diameter: 2-3/4 Inch / 70mm, Total Length: 3.35 Inch / 85mm, Hex Shank Diameter: 0.39 Inch / 10mm.

Design: Small incision resistance, improve the opening speed. It's head adopt arc curve design, beneficial to chip removal, perforation is more efficient.

Clean & Accurate Cutting: Two spurs and centering point can offer repeated, clean and accurate cutting holes. The sharp center spur accurately locates the center of your hole.

Designed for plumbers and electricians to bore holes in wood to run pipe and conduit, Swift Bore (Registered Trademark)

High-speed steel cutter designed for maximum cutting and chip removal

Tapered rim with multiple teeth cuts clean, smooth holes

Extends any 7/16" hex shank bit an additional 12", Swift Bore (Registered Trademark)

High-carbon steel construction, precision ground black oxide finish with 7/16" hex shank for secure grip

Two set screws and a hex key included. To fasten the shank in place, use the hex key to tighten these screws

This round shank Forstner bit extension will extend the reach of any Forstner bit 3/4 inch and larger with a 3/8” hex or round shank. Note: will fit auger bits.

Overall length 6-3/4 inches and adds up to 5-5/8 inches of drilling depth

Hole opening is .375 inches and hole depth 1-3/8 inches

[Size] Drilling Diameter: 22mm / 0.87 inch, Drilling Depth (approx.): 13mm / 0.51 inch, Shank Diameter: 8mm / 0.31 inch, Total Length: 126mm / 4.96 inch, with a Separate Plastic Box.

[Features] Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation.

[Applications] Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. It is a common tool for woodworkers.

Forstner Drill Bits: Drilling diameter: 18mm / 0.71"; shank size: 7mm / 0.28"; drilling depth: 92mm / 3.62"; total length: 128mm / 5". Thickened and sharp carbide tip, high strength and hardness high carbon steel body, hex shank forstner bits for woodworking.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

Forstner Drill Bits: Drilling diameter: 85mm / 3.35"; shank size: 10mm / 0.39"; drilling depth: 53mm / 2.09"; total length: 85mm / 3.35". Thickened and sharp carbide tip, high strength and hardness high carbon steel body, hex shank forstner bits for woodworking.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation

Product 1: Specs: Diameter 1/4" to 2-1/8", Length 3-1/2", Rotation RH, Shank 1/4" to 3/8"

Product 1: Razor-sharp serrated edges give smooth and flat-bottom holes.

Product 1: Quality Forged Construction for extended life

【Top Quality】Made from high quality Tungsten Carbide Tipped Cutters, solid hardened steel body, ensuring its high hardness, rust proof, sturdy and durable

【SIZE】Drilling diameter: 35MM(1-3/8"),Adjustable depth:10-40mm,Shank diameter:Hex 1/4",Accessories included:baffle,allen wrench.

【Features】Hex Shank is easy to install and tighten ,prevent the bit from slipping. Extra sharp cutting spurs is especially designed for cutting through hard and soft wood or other materials smoothly and efficiently.

Specifications: Cutting Dia.: 75mm / 2.95" 55mm / 2.17"; Shank Size: 10mm / 0.39"; Total Length: 86mm / 3.39" 82mm / 3.23". Hex shank, cemented carbide cutter and solid hardened steel body.

Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation.

Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc.. Forstner drill bit is for ordinary purpose.

Monolock 1/4-inch Hex Power Shank Forstner Bit

5/8-inch Diameter, 15.88 Shank

3-1/2-inch Overall Length