Best Inch Twist Drill Bits in 2026

Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)

Rigid, thick web design adds stability to bit in tough applications

Surface hardened to penetrate tough abrasive materials, Cuts through light gauge metal, high carbon steel, aluminum and alloy steel, cast iron and stainless steel

★【Premium Bright Finish 2/Pack】 multi-purpose solid carbide drill bits provide better rigidity than high speed steel bits. It is extremely heat resistant and used for high speed applications. Our tungsten carbide (WC) bits has the advantage of cutting metal either "wet" or "dry" and they provide solutions for many businesses such as aerospace drilling jobs for aircraft mechanics, precision machining, hobby supply, etc.

★【Recommended For Use On】 aircraft metals chrome titanium inconel stainless steel Alloys Steel Low-Medium-High Carbon Steel Aluminum Copper Glass Plastics Composite Materials Cast Iron -- Our Carbide drills stay sharp many times longer than traditional steel bits making them ideal for the toughest of applications!

★【Optimal Design for Metal Work】 118° four facet point angle minimizes drill wander and assures accurately sized holes. Our jobber length, precision ground carbide drills are designed for high feed rates with good chip disposal. smooth finish on the bits increases chip flow. Spiral flutes are constructed with a higher flute angle to remove chips more easily.

★【Pack of 2 / Premium Bright Finish】 Multi-purpose solid carbide drill bits provide better rigidity than high speed steel bits. It is extremely heat resistant and used for high speed applications. Our tungsten carbide (WC) bits has the advantage of cutting metal either "wet" or "dry" and they provide solutions for many businesses such as aerospace drilling jobs for aircraft mechanics, precision machining, hobby supply, etc.

★【Recommended For Use On】 aircraft metals chrome titanium inconel stainless steel Alloys Steel Low-Medium-High Carbon Steel Aluminum Copper Glass Plastics Composite Materials Cast Iron -- Our Carbide drills stay sharp many times longer than traditional steel bits making them ideal for the toughest of applications!

★【Optimal Design for Metal Work】 118° four facet point angle minimizes drill wander and assures accurately sized holes. Our jobber length, precision ground carbide drills are designed for high feed rates with good chip disposal. smooth finish on the bits increases chip flow. Spiral flutes are constructed with a higher flute angle to remove chips more easily.

[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] 14 different sizes including 16PCS 1/16", 16PCS 5/64", 15PCS 3/32", 10PCS 7/64", 10PCS 1/8", 8PCS 9/64", 8PCS 5/32", 3PCS 11/64", 3PCS 3/16", 2PCS 13/64", 2PCS 7/32", 2PCS 1/4", 2PCS 5/16", and 2PCS 3/8"

[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.

[SIZE LIST] 13 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" and 1/4", one piece for each size

Set of 29 heavy duty screw machine length drill bits includes inch sizes 1/16" to 1/2" in 1/64" increments

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

Uncoated (bright) finish has no additional surface treatment or coating

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

5/16 in. diameter, Jobbers length

Super hard Titanium Nitride surface treatment increases drill life up to 500% over uncoated drill bits

Premium industrial grade steel Self-centering, 135 degree split point reduces "walking" at the drill point

Set of 21 jobber length drill bits includes inch sizes 1/16" through 3/8" in 1/64" increments

Left-hand helix for counterclockwise drilling and broken screw removal

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

Extra-length, for deeper holes

118-degree conventional point angles good for general drilling applications

Round shanks can be used with a variety of tool-holding systems

Parabolic flute design offers enhanced chip removal, coolant flow to the drill point, and heat dissipation

Long length drill bits, also called taper length, have longer flutes and overall lengths than jobber drill bits

135-degree radius split-point is self-centering, reduces walking, good for hard material, and reduces pressure on cutting edges

[PREMIUM QUALITY] 99Pcs 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] 14 different sizes including 16PCS 1/16", 16PCS 5/64", 15PCS 3/32", 10PCS 7/64", 10PCS 1/8", 8PCS 9/64", 8PCS 5/32", 3PCS 11/64", 3PCS 3/16", 2PCS 13/64", 2PCS 7/32", 2PCS 1/4", 2PCS 5/16", and 2PCS 3/8"

Long length drill bits, also called taper length, have longer flutes and overall lengths than Jobber drill bits

118-degree conventional point angles good for general drilling applications

Round shanks can be used with a variety of tool-holding systems

Long length drill bits, also called taper length, have longer flutes and overall lengths than Jobber drill bits

118-degree conventional point angles good for general drilling applications

Round shanks can be used with a variety of tool-holding systems

Parabolic flute design offers enhanced chip removal, coolant flow to the drill point, and heat dissipation

Taper-length, for deeper holes

135-degree radius split-point is self-centering, reduces walking, good for hard material, and reduces pressure on cutting edges

[Specifications]- Twist Drill Bits Diameter: 3mm / 0.12-inch; Drill Bit Length: 73mm / 2.87-inch; Shank Diameter: 3mm / 0.12-inch; Total Length: 120mm / 4.72-inch; 1 x Parabolic Flute Drill Bit

[Strength and Hardness]- Made of M35 HSS(High Speed Steel) cobalt steel. With high hardness and red hardness, wear-resistant, and fast drilling performance.

[Surface Treatment]- The gold oxide surface treatment increases the hardness of the drill bit, provides longer drilling life and better drilling performance, and is more durable and corrosion resistant than uncoated drill bits.

【SIZE】- Cutting Edge Diameter : 7mm / 0.28"; Shank Diameter : 7mm / 0.28"; Total Length : 350mm / 13.78"

【MATERIAL】-This twist drill bit was made by High Speed Steel and the hardness HRC is 62~63 which is harder and tougher to extreme loads,not easy to break

【ADVANTAGE】- Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications

Long length drill bits, also called taper length, have longer flutes and overall lengths than Jobber drill bits

118-degree conventional point angles good for general drilling applications

Round shanks can be used with a variety of tool-holding systems

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.

Long length drill bits, also called taper length, have longer flutes and overall lengths than Jobber drill bits

118-degree conventional point angles good for general drilling applications

Round shanks can be used with a variety of tool-holding systems

Uncoated (bright) finish, economical and useful with a wide range of drilling materials

Long-length drill bits, provide long reach

118-degree conventional point angles, for general drilling applications