Best Inch Twist Drill Bits in 2026

DEWALT 21-pack black oxide twist drill bit set is ideal for general-purpose drilling materials like metal, hardwood, softwood, PVC and fiberglass

Parabolic flute design increases chip ejection in metal and wood drilling applications

Black oxide coating helps resist corrosion and increase durability, so your drill bits last longer

5/8 HSS 3/8IN DRILL BIT

5/8 HSS 3/8IN DRILL BIT

5/8 HSS 3/8IN DRILL BIT

This product is easy to use.

This product is highly durable

This product is manufactured in China.

Convenient Size Variety: This 29-piece bit set includes everything you need for a user-friendly experience that suits all your needs. The set comes with: 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" bits.

A Must For Professionals: The CaRoller drill bits sets are an excellent choice for professionals as well as DIY enthusiasts, enjoying superior durability and including various sizes that go well with your multiple needs.

Heavy Duty Construction: This wood drill bit set is made with premium grade, highly durable materials, a combination of W4 high speed steel, amber coating and black oxide finish which ensures long-lasting use and superior wear resistance!

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Drill, Tap and Ratchet Tap Wrench Set Includes: 9 drill bits include wire gauge sizes #36, #29, #25, #21, #7, letter sizes F, U and inch sizes 5/16", 27/64". 9 hand taps include 6-32 UNC, 8-32 UNC, 10-24 UNC, 10-32 UNF, 1/4"-20 UNC, 5/16"-18 UNC, 3/8"-16 UNC, 7/16"-14 UNC, and 1/2"-13 UNC. 1 ratchet tap wrench fits 0-1/4" tap. The set has a strong and professional box with indexed holder and standing up tiers for easy storage and pickup.

Wide Applications: The tap and tap wrench are designed to make shallow cuts in narrow spaces. The drill and tap combo are tailored for industrial production, maintenance or portable drilling jobs in metal, aluminum, and plastics. And they fit majority drill driver brands on the market. Taps in this set can be driven by both hand and machine.

Drill Bits, SAE Taps and Gear Tap Wrench Cost-Efficient Combination: provides a secure method of drilling the proper hole size before cutting right-hand internal threads. The T-handle silver wrench allows three settings-forward, reverse and lock positions which can be set with your hand efficiently. Purchasing all three tools in one combo offers convenience and cost efficiency. It is much cheaper than buying them separately.

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge

Round shanks allow use with a wide variety of toolholding systems

Set of 60 jobber length drill bits includes one each of wire gauge sizes #60 through #1

High-speed steel (HSS) provides hardness for wear resistance

Black oxide finish reduces bit wear while promoting chip and coolant flow on ferrous material

CAPABILITY & DURABILITY: Classic HSS construction with black oxide coating for capability and durability, also ensures a longer service life so that the drill bits last through multiple uses.

135° SPLIT POINT TIP & TWIST DESIGN: Increases cutting speed with self-centering and prevents walking, clears chips and particles faster

MULTI-FUNCTIONAL: Great drill bits set for metal/wood/plastic countersink. Suitable for Home DIY, and General Building/Engineering Use.

✅【Five-blade design】Each countersunk drill adopts five-blade blade design, which can reduce vibration and prolong life, achieve smoother drilling, with 1/4" metal hex.

✅【Compact Grinding】Precision grinding 82° tip for drilling holes on most medium hardness stainless steel, copper, aluminum, wood, plastic.

✅【M2 HSS Cobalt Layered Drill Bits】M2 Cobalt Coated, each metal countersunk drill bit is made of high quality M2 HSS material, this countersunk drill bit set is excellent in heat, corrosion and rust resistance to reduce friction and run cooler.

Quality HSS M2 ensures sharp and fast execution in any material for clean results

Premium Heat treated black oxide is durable and withstand heavy duty operation for a long tool life

3-flat shank provides better chuck grip and reduces slippage, maximizing security for precise holes

15/32 in. diameter, Jobbers length

Precision ground flutes

High speed steel throughout, black oxide finish 118 degree standard point

5/16 Inch HSS Jobber Length Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc.

High Quality Material- High Speed Steel

High Efficiency In Drilling Metals, and Stainless Steel.

Sizes in Set: 1/16 - 1/2 x 64ths; #1 - #60; A - Z

Number of Tools: 115

Manufactured to NAS 907 Type J geometry aerospace specifications with self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging and gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools

Set of 29 short length drill bits includes inch sizes 1/16" through 1/2" in 1/64" increments

High-speed steel (HSS) provides hardness for wear resistance

Black oxide finish reduces bit wear while promoting chip and coolant flow on ferrous material

【Size & Package】Cutting Edge Diameter : 15mm / 0.9"; Shank Diameter : 1/2"; Cutting Edge Length: 78mm / 3.07"; Total Length : 150mm / 5.9"; Package includes 1PC 15mm reduced shank twist drill.

【Black Oxide Surface】Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge. The surface coating can also better protect the reduced shank drill bit sets from corrosion and expand their life.

【Sharper & Hard】Made of High Speed Steel 6542 material, the reduced shank drill bit is hard enough, anti-bending and will not fracture easily. The sharp cutting edge and spiral flutes promote faster as well as preciser drilling. Helping you work more efficiently and get rid of glitches or scrap.

Ship Auger Drill Bit: Equipped with a dual-helix cutting edge, the long ship auger offers fast, reliable and smooth drilling applications for all kinds of timber and wood leaving a cleanly drilled hole

Durable: The IDEAL long ship auger has a black oxide coating and is made from hardened machine steel making it durable and resistant to corrosion. The dual cutting edges and powerful screw tip power through nails and other embedded metals without breaking

Effortless Drilling: The oversized cutting head and the tapered dual flutes allow for easy chip removal without pulling back. Its dual-helix cutter head provides twice the cutting surface per rotation requring less effort to drill

High Speed Steel for general purpose drilling in a variety of materials

Jobbers Length Drill - most common overall length

135 -Degree split point to help prevent drill -Inchwalking-Inch

Quality HSS M2 ensures sharp, fast in any material, offers good hardness, toughness, wear resistance

Premium Heat treated HRC63-66 is durable and can withstand heavy duty operation for a long tool life

Black Oxide Surface holds up lubricant better and lead coolant near the cutting edge for smoother drilling

High quality High Speed Steel for proven capability of drilling plastic, wood, and sheet metal. Black Oxide Coating for ensured durability

High performance carbide drills for aluminum materials

118 Degree Split Point tip design to help reduce walking, ensures clean & accurate hole drilling

【Size 】Cutting Edge Diameter : 12mm; Shank Diameter : 10mm; Cutting Edge Length: 75mm/2.95"; Total Length : 150mm/5.9". Package：1 piece.

【HSS Material】Made of high speed steel 4341 offer the reduced shank tool hard and tough, cutting effectively with impressive cutting performance.

【Gold and Black Oxide Finish】Gold titanium and black nitride dual coatings can apply lubricant better for smoother drilling and is more durable and corrosion resistant than the regular surface.

COUNTERSINK DRILL BIT SET - Also Countersink For Woodworking - Included 3 Pieces all same size #6(9/64" Tapered drill bit) Cutters (for up to 3/8" or 10mm screws head), 1 extra Tapered High Speed Steel M2 Drill Bit (6542 grade), 1 Stop Collar, 1 Hex Wrench

ADJUSTABLE COUNTERSINK - Also Countersink Bits For Wood - The Adjustable Stop Collar allows you to adjust the Counterbores depth and Adjustable Cutters can be adjusted for many screws sizes. Also known as Juego De Brocas Avellanadoras Para Madera, Avellanadores Para Madera, Juego De Brocas Para Avellanar, Broca De Avellanado.

QUICK CHANGE SHANK - The Quick Change 1/4" Shank is Universal size, Compatible with all 1/4" Quick Change Chucks.

Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys

Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools

Hex shank drills are designed for handheld applications in power tools that accept hex shanks.

Size - Drill Bit Diameter: 6mm / 0.24-inch; Flute Length: 127mm / 5-inch; Shank Diameter: 6mm / 0.24-inch; Total Length: 200mm / 7.87-inch.

Material - It is made of 6542 HSS (high speed steel) steel, which has good toughness and hardness, is not easy to break, and is easy to remove chips. Black oxide surface treatment, good rust resistance long durability.

Feature - The spiral groove design can avoid the displacement of the drill bit during the working process, and at the same time, the debris can be removed more quickly and easily. Sharp cutting edges provide smooth cutting without burrs.

7/16 impact duty drill bit

Durable titanium construction for long life

Designed to stay sharper longer