Best Irwin Tools Forstner Drill Bits in 2026

Specs: Diameter 7/8", Length 3-1/2", Rotation RH, Shank 3/8"

Razor sharp serrated edge for fast and flawless cutting

Quality Forged Construction for extended life

Ideal bits for drilling in plywood, hard wood, and soft wood with handheld drills and drill presses

Drill flat bottom holes, pocket holes, and overlapping holes

Wood case for easy storage and protection

Drills flat-bottomed and pocket holes in significantly less time than traditional Forstner bits

Features optimized ultra-sharp knife edge design specifically engineered to cut through hard and soft woods smoothly and efficiently

Easily drills high-quality flat-bottomed and pocket holes with a fine, smooth finish

Included cutting diameters: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8", 1-1/2", 1-5/8", 1-3/4", 1-7/8", 2" and 2-1/8".

Drill clean and accurate holes in solid wood, plywood and MDF

Constructed from high-speed-steel for quality and longevity

Cuts quick, precise holes in stainless steel, mild steel, iron, copper and brass sheet up to 3/16-Inch (5 mm) thick

Split point pilot drill bit prevents bit walking

Integrated flange prevents the operator from drilling beyond the sheet metal

Drilling with forstner bits to achieve a flat bottom hole or to start a deep hole turning project like on a larger vase or vessel is essentially impossible with a standard length forstner bit. To remedy this issue we have developed a heavy duty steel extension that allows you to secure a 3/8 inch shank forstner bit into the end collet.

The forstner bit extension gives you additional 5-5/8 inches of reach to bore deeper into your projects. This will help you create larger diameter starter holes or help when you need to drill in just a little further than the standard bit length will allow. The extension can be used with forstner bits on drill presses, lathes with a drill chuck installed (drill chuck not included) or with a power drill.

One of the most common uses for the forstner bit extension is for woodturners who need to bore out starter holes on larger vessels. However, the extension works exceptionally well for projects like salt shakers, pepper mills or even wood turned beverage mugs. Contractors use the extension when they need to bore deep holes for running cables or wires and they also use it for joining larger timbers.

Easily drill perfect circles into your workpiece

Includes 1/4-inch (2), 3/8-inch, 1/2-inch, 5/8-inch, 3/4-inch, 7/8-inch, 1-inch, 1-1/8-inch, 1-1/4-inch, 1-3/8-inch, 1-1/2-inch, 1-5/8-inch, and 2-inch diameter drill bits

3/8-inch round shank compatible with the majority of drill and drill press chucks

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 on a larger vase or vessel is essentially impossible with a standard length forstner bit. To remedy this issue we have developed an extra long, heavy duty steel extension that allows you to secure a 3/8 inch shank forstner bit into the end collet.

The forstner bit extension gives you additional 8-1/2 inches of reach to bore deeper into your projects. This will help you create larger diameter starter holes or help when you need to drill in just a little further than the standard bit length will allow. The extension can be used with forstner bits on drill presses, lathes with a drill chuck installed (drill chuck not included) or with a power drill.

One of the most common uses for the forstner bit extension is for woodturners who need to bore out starter holes on larger vessels. However, the extension works exceptionally well for projects like salt shakers, pepper mills or even wood turned beverage mugs. Contractors use the extension when they need to bore deep holes for running cables or wires and they also use it for joining larger timbers.

Forstner bit set for drilling holes in softwood or solidwood, plywood, coated chip board, laminates and mdf plates

Includes a 14-piece drill bit set with common bit sizes from 1/4 to 2 inch, plus a carry case; black

Creates a fine smooth finish for durability and long life

【Areas of Application】1-1/2" Forstner bit is ideal for drilling in soft or hard wood, veneered wood and non-laminated chipboard

【Clean, Smooth Holes】The tooth-shaped design of this high-speed steel forstner bit ensures less friction and heat.It is superiority in removal chip better.Cut the clean, smooth holes

【Easy to Start】The design of the center point of the forstner drills allows precise positioning without slipping,which makes drilling more easy

3-35/64-Inch Overall Length, Right-Hand Rotation.

2 spurs, 2 precision ground cutting edges, long-lasting cutting performance

Drill precise flat bottom holes with no chipping in any thickness of soft wood

Forstner bit made of High speed steel, has a 1" cutting diameter and round shank, compatible with all standard drill and drill press chucks.

Excellent for drilling in softwood or solidwood, plywood,coated chip board, laminates as well as mdf plates

The tooth-shaped design for fast and flawless cutting, ensures less friction and heat, which enable optimized chip removal, longer service life.

Material: Made of high quality Carbide Tungsten Steel, with hot process, high hardness, high precision, high toughness, smooth cutting and high resistance to impact.

Highly working efficiency: With highly hardness and excellent workmanship design, these forstner drill bits can be used for high speed rotary drilling, and the perforation is neat, smooth, no broken edge, also wood chips can be discharged quickly. Safety and labor saving.

Set of 14 size: 3/5"(15mm), 2/3"(17mm), 5/7"(18mm), 11/14"(20mm), 13/15"(22mm), 17/18"(24mm), 63/64"(25mm), 1-1/16"(27mm), 1-1/10"(28mm), 1-2/11"(30mm), 1-6/23"(32mm), 1-1/2" (38mm), 1-10/13"(45mm), 2-1/11"(53mm)

Brad Point to Start Holes Cleanly

Sharp cutting edge for smooth holes

Reduced shank fits 3/8-Inch and larger drills and drill presses

This carbide forstner bit has a 3" cutting diameter and a 10mm shank compatible with all standard drill and drill press chucks.

Drill clean and accurate holes in solid wood, plywood and MDF

Constructed with carbide tips for quality and longevity

【 Super Sharp 】: Just like a hot knife thru warm butter, and that is drilling into sycamore,so smooth, so fast. Basynol Forstner bits set,best choice, it's a tool to get pleasured work!.

【 Easy to Start】: Ultra Sharp Spur to ensure an accurate starting hole without slipping.

【 Precise, Clean Hole】: It cuts cleanly and accurately with no wobbling or burning the wood.Excellent for drilling wood holes which you want.

【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)

4-5/8-Inch Diameter

1/2-Inch hex shank

Adjustable tapered screw tip

Suitable for hard and softwood, veneered chip board, laminates as well as MDF plates

High Rotation Speed means wave rim edge scribes the hole before cutting begins

Precise Cutting Quality - CNC machined - CNC sharpened

【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)

Easily drill perfect circles into your workpiece

Includes 1/4-inch, 3/8-inch, 1/2-inch, 5/8-inch, 3/4-inch, 7/8-inch, 1-inch, and 1-3/8-inch diameter drill bits

3/8-inch round shank compatible with the majority of drill and drill press chucks

SPLINTER FREE HOLES: Drill clean and precise 90° flat bottomed or through holes in wood and plastic.

DRILL OVERLAPPING HOLES: Unique forstner bit types can drill without slippage.

DURABLE: Made from 40R steel.

【SIZE】The Slabs flat wing drilling Hole bit has 35mm cutting diameter, 10mm shank, compatible with all standard drill and drill press chucks.

【HIGH QUALITY】Optimized alloy blade , Carbon steel body, make the fostner bit durable,and more smoothly.

【PRECISE CUTTING】Two spurs and center cutter ensure clean and accurate hole cutting, great for boring concealed hinges and door locks.

3-35/64-Inch Overall Length, Right-Hand Rotation.

2 spurs, 2 precision ground cutting edges, long-lasting cutting performance

Drill precise flat bottom holes with no chipping in any thickness of soft wood

3-35/64-Inch Overall Length, Right-Hand Rotation.

2 spurs, 2 precision ground cutting edges, long-lasting cutting performance.

Drill precise flat bottom holes with no chipping in any thickness of soft wood.

🔨【Most 1/4 Inches Bits Compatible】The 1/4 Drill Bit Extension Set can meet almost all your needs, such as screws, nuts, drills, hand drivers, tool boxes and construction can use wood bit extension kits. With this extra long Wood Spade Drill Bit Extender you can get almost anywhere.

🔨【High-Quality Materials】The Drill Bit Extension Set is made of high carbon steel, which is strong and reliable, durable, not easy to deform, not easy to bend and break, rust and corrosion resistant. Stays in place and doesn't wobble when in use, and also gives you maximum control and accuracy when drilling and driving.

🔨【Multifunctional Applications】Whether you are a novice or a skilled worker, it is your good helper. Perfect for mechanics, construction jobs, homeowners or anyone who wants to work, Drill Bit Extension Set can be done in a convenient, easy way. Ideal for use with wood spade bits. The Wood Spade Drill Bit Extender can be used with a forstner bit on a drill press, a lathe equipped with a drill chuck (drill chuck not included) or an electric drill, saving you time and effort.

This product is easy to use.

This product is highly durable

This product is manufactured in China

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: 1-1/2 Inch / 38mm, Total Length: 3.15 Inch / 80mm, Round Shank Diameter: 0.35 Inch / 9mm.

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.

【15-Piece Forstner Bit Set】: jxgzyy wood drilling forstner bits from 2/5 to 2 Inch include 10mm(2/5''), 12mm(1/2"), 15mm(19/32"), 16mm(5/8"), 18mm(45/64"), 20mm(3/4"), 22mm(7/8"), 25mm(1"), 26mm(1-1/16"), 28mm(1-1/8"), 30mm(1-3/16"), 35mm(1-3/8"), 40mm(1-3/5"), 45mm(1-3/4"), 50mm(2"). Come with a wooden storage case, easy to organize the bits and protect them when not in use.

【Durable Material】: Forstner bits set is made of high-quality steel, with the advantage of sharp edge, accurate positioning, high precision and stable cutting.

【Sharp Design】: Our drill has the features of sharp edge, accurate positioning, high hardness, impact resistance, high precision, smooth cutting and high toughness. Fostner bit can produce holes that are smooth and flat, and create "chisel-like" curls for fast, clean chip removal.