Best Irwin Long Drill Bits in 2026

HSS Titanium Coating - Classic HSS construction with titanium coating for capability and durability. The cutting edge is hardened and honed for sharpness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean.

Flutes Form - 2 flutes form helps clear chips and debris away from the bit, decreasing friction and heat for a faster, cooler drilling process.

Quick Change - 1/4 inch hex shank fits into all power tools more easily and securely, specially for locking into quick change chuck.

1/2" Diameter X 12" Long Auger Drill Bit with a 3/8" Hex Shank

Made of Carbon Steel. Solid Center Design for extra rigidity while boring.

Perfect for drilling into soft and hardwood, MDF, Plywood, Lumber, Railroad Ties, Landscape Timber, Invisible Floating Shelf Bracket Installation, tree stump boring, for up to 10” deep hole. Easy to bore into tree stump, lumber, landscape timber and railroad ties.

JOBBER LENGTH: 1/8-inch cutting diameter, 1-5/8-inch flute length, 2-3/4-inch overall length, 135 degree split point, straight shank

MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits

CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits

Length: 6"

Shank Size: 1/4

CONTAINS 2 AUGER DRILLS BITS (Drill not included): You’re getting not just one, but two easy-to-use augers drill bits in this K-Brands value pack. Plus, they’re a breeze to use - all you need to do is attach the auger bit to a standard 3/8” hex bit drill. Hold with both hands, and then turn it on to dig downward. Reverse the drill to pull the soil back up, and you get the perfect posthole.

A MUST-HAVE TOOL FOR YARD WORK: While this spiral drill bit is perfect for planting bulbs and bedding plants, as well as shredding up weeds and mixing fertilizer, it’s not just limited to garden work. Easily dig holes for fenceposts, ground lights, outdoor torches, and umbrellas - all with one tool.

CUT YOUR WORK TIME IN HALF: No more blisters or sore hands. Reduce the amount of time it takes to plant a flowerbed or put up a fence. Perfect for digging as many holes as you need, in a fraction of the time it would take by hand.

Extreme Durability: Cobalt high speed steel drill bits along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.

Different Sizes of Holes Can Be Drilled: Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes. You are capable to drill holes in different sizes which can meet your normal needs.

Smooth Drilling: Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits).

115 PIECES INCLUDED: 29pcs Fractional Size:1/16” to 1/2” in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60.

HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance.

PRECISE 135° SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster.

Each WeldTec auger bit features a hard cutting edge welded to the base material

Auger drill bit features a long-lasting nail-cutting life

Wide flutes and a 7/16-inch quick-change impact shank make this a versatile auger drill bit

Chamfered cutting edges for increased durability

Patented Blue Groove parabolic scoop for faster chip removal

Designed for impact drivers with 1/4" impact rated shank

The item is Bosch Daredevil DSBE1012 12-inch drill bit extension

Used for power tool accessories, drill bits & accessories

The product is manufactured in China

【10Pcs 1/8" Cobalt Drill Bits】10Pcs - 1/8”(Dia 3.18mm) x1-5/8”(Flute Length 41.28mm) Metal Drill Bits.This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and organization.

【M35 Cobalt High Speed Steel】Industry grade M35 high speed steel drill bit set, much harder than HSS used in other similar drill bits set. These drill bits contain 5% Cobalt, which increases wear-resistance and durability.

【Fully Ground Process & 135° Split Point】Fully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. 135° split point with straight shank prevents walking and makes drilling precise and faster. No center punch is needed.

Premium 6% Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.

Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.

This Cobalt Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.

82˚ point for fast, smooth drilling in wood

Hole in flute for easy wire pulling through walls, ceilings and floors

3-flatted shank prevents slipping in drill chuck and includes hole for wire pulling Hole not included on 12" length bits

STEP DRILL #1 1/8-1/2" 13 SZ

STEP DRILL #1 1/8-1/2" 13 SZ

STEP DRILL #1 1/8-1/2" 13 SZ

drills holes 2x faster. more holes. less time

lasts 2x longer to get more done

chamfered cutting edges for increased durability

【Premium HSS Titanium Coating】High speed steel (HSS) with titanium coating gives Jefe Hex drill bit great durability and prolongs 3 times longer life than drill bits without coating.

【Easy Cut Split Point】Jefe Hex Easy Cut Point design makes drilling easy with less pressure and prevents drill bit walking on the working surface. Fully ground modified parabolic flute design clears chips quickly, decreases friction and heat damage. Tapered web provides durability and reduces breakage.

【Quick Change】1/4" (6.4mm) hex shank fits into standard power tools and impact drivers. Jefe Hex drill bit’s solid bonding technology manufacturing eliminates radial runout and improves concentricity. High torque, impact-rated accuracy.

Premium High Quality - Short length drill bit is made from superior HSS M2 material with evenly distributed carbides for long lasting strength and durability. The drill bit is always sharp at each use.

Twist Design - Full ground processing and 135 degrees split point clears chips & particles faster, it also delivers powerful penetration against the metal , plastic, wood and other hard surfaces.

Quick Change - 1/4” hex shank fits into all power tools more easily and securely, it is suitable for quick change drill chunks for fast and easy swapping.

1" Diameter X 12" Long Auger Drill Bit with a 3/8" Hex Shank

Made of Carbon Steel. Solid Center Design for extra rigidity while boring.

Perfect for drilling into soft and hardwood, MDF, Plywood, Lumber, Railroad Ties, Landscape Timber, Installing PVC pipes, Tree stump boring, for up to 10” deep hole. Easy to bore into tree stump, lumber, landscape timber, vigas and railroad ties.

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.

【Material Sturdy】Digging machine drill made of high hardness alloys, high hardness, good wear resistance,with premium paint coated for long service time.

【Work Quickly】 Digging hundreds of holes in minutes without worry about bending or broke,which will maximize improve your planting job，user-friendly design will help save your back, don’t need to bent down to do your garden work.

【Easy To Use】It will work with any 3/8" or larger chucked drill, we suggest using 18V or greater drill with adjustabl

Built for maximum durability and long life with impact drivers.

DoubleLokTechnology ensures both ends of bit lock securely

Precision tip geometry delivers superior fitment, reducing stripping and cam-out

4-Flute design with screw-point tips for easy to start self-feed drilling point

Four cutting spurs for faster chip clearance and cutting

Commonly used diameter sizes makes perfect for many DIY projects. 1/2", 5/8", 3/4" and 1" diameter sizes included. Each bit is 6.5" long.

3/4" Diameter X 12" Long Auger Drill Bit with a 3/8" Hex Shank

Made of Carbon Steel. Solid Center Design for extra rigidity while boring.

Perfect for drilling into soft and hardwood, MDF, Plywood, Lumber, Railroad Ties, Landscape Timber, Invisible Floating Shelf Bracket Installation, Tree stump boring, Drilling Vigas for building Pergola for up to 10” deep hole. Easy to bore into a tree stump, lumber, landscape timber, vigas, and railroad ties.

Built for maximum durability and long life with impact drivers

ensures both ends of bit lock securely in impact drivers and quick-change chucks, enabling use of two tips from one bit

Precision tip geometry delivers superior fitment, reducing stripping and cam-out

[PREMIUM QUALITY] TICONN drill bits are made from premium quality titanium coated high speed steel (HSS). These bits will stay sharper, last longer, and can drill at higher speeds than uncoated and oxide-coated drill bits. Double U shape flutes design clear chips effectively

[WIDE APPLICATION] 135° point angle drill bits keep centered without a pilot hole. These jobber self-centering drill bits have the rigidity and length for most applications of corded or cordless hand drills and drill presses. Ideal for drilling mild steel, aluminum, copper, soft alloy steel, wood, and plastic

[SIZE LIST] 30 different sizes including 1/16, 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2", one piece for each size and a adapter.

【Drill Bit Set】：Includes 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2". This 29 PCS M35 twist drill bit set meets all your needs

【Cobalt 5% HSS】: High-Speed Steel M35(Cobalt 5%)cobalt drill bit set can effectively drill tough and high tensile materials. The M35 drill bit is especially suitable for cutting hard metals, such as stainless steel, cast iron, superalloys, titanium alloys, rigid plastics, and wood, It can also be used in soft materials

【Characteristics】: The metal drill bit is 135°split point with a round straight shank, self-centering prevents walking, and makes drilling precise and faster. Double back Angle process and full grinding process is adopted fully ground process twist design helps clear particles faster, decreases friction and heat for a cooler drilling performance

Built for maximum durability and long life with impact drivers

ensures both ends of bit lock securely in impact drivers and quick-change chucks, enabling use of a single bit

Manufactured with M2 high speed steel and extra-hardened for maximum durability and long life with impact drivers

These impact socket adapters use a ball-retention design for quick-change applications

Impact drivers help provide durability and long life

Socket adapters have a forged socket body for additional strength

Package includes: you will get 2 pieces 1/4 spade drill bit extension hex shanks and 2 pieces hex keys, which are helpful for wood spade bit extension; 2 Sizes for length, namely 6 inches and 12 inches, provide nice operability; Suitable for hard-to-reach bolts and screws, allowing you to complete your work better and faster

Fits for most 1/4 inches bits: wood bit extension sets are suitable for most 1/4 inches drill bit extension hex shank insert and power bits, which can be applied for all of your needs screws, nuts, drills, handheld drivers, tool box and construction; With that extra-long extension, you’ll be able to reach almost everywhere; Please confirm the size before buying

Reliable material: the spade drill bit extension is made of high-carbon steel, safe and durable to use; It not only can hold bits securely in place to make sure that your bits keep in place and never wobble while in use, but also give you maximum control and accuracy when drilling and driving; Besides, the durable high-carbon steel construction makes it to has nice rust resistance, and suitable for use with wood spade bits

Visible clear lid of the drill bit set are desgined for easy viewing of contents

Stackable - for convenient travel and storage of the drill bits for wood

Accessible drill bits for wood are made for customizable kits