Best Irwin Forstner Drill Bits in 2026

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 cutting teeth 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

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

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

Quality Forged Construction for extended life

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

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

Razor sharp serrated edge for fast and flawless cutting

Quality Forged Construction for extended life

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

Features optimized ultra-sharp cutting teeth 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

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.

8 PCS Forstner Bit Set Specifications: 1/4"(6.35mm), 3/8"(9.52mm), 1/2"(12.7mm), 5/8"(15.9mm), 3/4"(19.05mm), 7/8"(22.2mm), 1"(25.4mm), 1-3/8"(34.9mm)

Kowood C2 Carbide: This forstner bit set tipped Carbide is more stable, durable, and smooth compare with HSS

Kowood forstner bit set designed: Ideal for pocket holes, overlapping holes, and holes at the edge

This product is easy to use.

This product is highly durable

This product is manufactured in China

3-1/2" overall length, 1-1/8" diameter, .375" round shank

Bores precision holes at any angle

Extra sharp cutting edges drill smooth, flat-bottomed holes

This product is easy to use.

This product is highly durable

This product is manufactured in China

Reduced shank fits 3/8" and larger drills and drill presses

Starts the bit cleanly on uneven surfaces

This product is easy to use.

This product is highly durable

This product is manufactured in China

3-1/2¿ overall length, 2-1/8¿ diameter, .375¿ round shank

Bores precision holes at any angle

Extra sharp cutting edges drill smooth, flat-bottomed holes

5-piece IRWIN Marples 3-1/2" long drill bits for wood forstner bit set in sizes 1/4" (1966894), 1/2" (1966896), 3/4" (1966898), 1" (1966900), 1-1/8" (1966931) for versatile woodworking projects.

The forstner bit set for wood constructed of tough carbon steel to stay sharp for creating precise pocket holes & flat-bottomed holes in wood for tasks such as mortise and tenon joints and doweling.

The forster bites set, woodworking tools and wood drill bit set are perfect for both professional and DIY woodworking projects to cut through hard and soft woods smoothly and efficiently.

4"

Fits all Irwin forstner bits 5/8" and larger

Reduced shank fits 3/8" and larger drills and drill presses

Starts the bit cleanly on uneven surfaces

For boring flat bottom holes in wood

Fits 3/8" min. chucks

Clamshell

FORSTNER BIT 18 PIECE MERCHANDISER

FORSTNER BIT 18 PIECE MERCHANDISER

FORSTNER BIT 18 PIECE MERCHANDISER

Diameter:21/4 in

Material:Carbon Steel

Finish:Black Oxide