Best Precision Twist Drill Long Drill Bits in 2026

[LONG REACH]: Extra-long drill bits give you 12 inches of added length to work with and provides more stability during quick operations.

[DURABLE]: These drill bits are made from heat-treated M2 high speed steel for excellent hardness, wear resistance, and toughness.

[SMOOTH DRILLING]: Combining high hardness and sharp pointed tips, these drill bits easily puncture tough materials for a smooth drilling finish.

HIGH QUALITY MATERIAL: 5% Cobalt High Speed Steel M35 provide extended tool life compared to ordinary drill bits. Durable and strong

TWIST DESIGN & PERFORMANCE: PRECISE 135°SPLIT POINT, gold oxide finish and round straight shanks. Prevent walking, clear chips and particles faster.Produced by precision fully ground which ensures chips move smoothly.

PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.

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

Diameter: 2mm(0.08in) 2.5mm(0.09in) 3mm(0.12in) 4mm(0.16in) 4.5mm(0.18in) 5mm(0.2in) 6mm(0.24in) 7mm(0.28in).Length:about 200mm(about 7.8 inch)

Application:drill bits kit are great for most drilling jobs and materials such as aluminum, wood, plastics PVC and other different materials or your daily drill use.

Quantity:This set includes 8 pieces drill bit in different sizes of the most popular drill bits.1 pc/per size.

【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 3X Heat,Wear and Chip Resistance and 3X Tool Life.

【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws.

【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 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.

Quality material: the cobalt drill bit set uses cobalt M35 high speed steel as material, this material is durable, strong and practical, with a long service life, heat and abrasion resistance; The cutting edge of drill bit is hardened and honed, with accurate cutting without shaking

Creative twist design: metal cobalt drills for hardened steel has 135° split point tip and torsional design to improve cutting speed with self-centering ability; They can avoid walking during work process, while clearing chips and particles more quickly and easily

Nice features: the 1/8 inch twist drill bits have precise diameter; M35 cobalt drill bits for hardened metal are not easy to break or wear out, so suitable for lithium electric drill, hand electric drill, impact electric drill, etc.; The size is small, please pay attention to use

✅【5% COBALT TWIST DRILL BITS SET】Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 25 times.

✅【METRIC DIRLL BITS SET】The drill bits include 13pcs metric drills: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm, can meet more needs.

✅【TWIST DESIGN AND PERFORMANCE】Precise 148° SPLIT Point, Gold Oxide Surface and Round Straight Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.

EXTRA LONG LENGTH & 2 TYPE SHANK: Extra long 300mm body provides better stability and balance during quick operation to ensure position is intact. Flute length is 180mm with ROUND shank and REDUCED shank.

HIGH QUALITY MATERIAL: Classic Carbon Steel Material for fast cutting against tough wood material. High hardness, offer superior cutting power and durable.

FULL SET OF STANDARD SIZE: With the drill bits we offered, you can process 7 different diameter holes, ( Round shank| 1/8'', 3/16'', 1/4'', 5/16'', 3/8'' Reduced Shank| 7/16'', 1/2'' ), which meet your different needs perfectly.

Material : Diameter Size of Micro HSS Drill Bit Set is 2.5mm.

Package Include: 10 pcs metal drill bits fit for the majority of power drill currently on the market and come with a portable plastic case for easy storage and organization.

Quality Material: Cobalt drill bit set adopts HSS-4341, which is durable, strong and practical, long service life, heat resistant and wear-resistant; The cutting edge of drill bit is hardened and honed, cutting precision, no shaking.

【extral long length】Bits are 150mm~160mm(about 5.9~6.3 inchlong, provides better stability and balance during quick operation to ensure position is intact.

【long cutting edge】The extra long cutting edge(88-100mm) allows you using these bits to drill deep holesshape tips can make the drilling easier and more effortless.

【5 sizes】This extra long twist drill bits set has 5pcs in 2mm, 3mm, 3.5mm, 4mm, 5mmOD.

High-Speed Steel Construction: Made from Titanium Coated HSS-4341. The Twist power tool drill set with heat resistant and wear resistance can provide longer tool life, suitable for drilling high hardness materials

Multiple Use: Wire Gauge Micro Drill Bits are ideal for gold, silver, wood, hard and soft metals, plastic, PVC, beads, and jewelry. it can be used with a wide range of hand and motorized tools for home DIY, workshop or vehicles repair shop.

Practical Design: The Rotary hand tools designed with 135° split point are very lightweight, making cutting faster and less powerful, preventing walking and cutting stainless steel more precisely, thanks to its precision grinding inclined blade design.

✅【M35 TWIST HEX DRILL BITS SET】Made from M35 Cobalt Steel with Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 12 times.

✅【13PCS SET COMBINATION】13 most common sizes (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") to meet all needs, a drill holder with size index is included in the set for easy storage and organization.

✅【FULL GRINDING PROCESS AND 135° SPLIT POINT】Precise 135° SPLIT Point, Gold Oxide Surface and Round Straight Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.

✅【5% COBALT TWIST DRILL BITS SET】Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 12 times.

✅【13PCS SAE DIRLL BITS SET】The set includes 13pcs drill bits. Organized in a sturdy plastic storage case for easy transport to your workplace.

✅【TWIST DESIGN AND PERFORMANCE】Precise 135° SPLIT Point, Gold Oxide Surface and Round Straight Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

[Specifications]- Twist Drill Bits Diameter: 2.5mm / 0.1-inch; Drill Bit Length:100mm / 3.94-inch; Shank Diameter: 2.5mm / 0.1-inch; Total Length: 160mm / 6.3-inch; 2 x Straight Shank Twist Drill Bit

[Strength and Hardness]- Made of high-speed steel. HSS(High Speed Steel) enables the drill body harder and can keep a longer drilling life.

[Twisted Design]- With the twisted design, it can improve cutting accuracy by centering the tip. It can avoid displacement of the drill bit during work, and at the same time remove debris and particles faster and easier.

Achieve precision drilling with ease: Our Perfect Drill Bits are designed with a precision grinding process that ensures a clean surface and high grinding accuracy. The universal round drill shank makes it widely applicable to tool holding systems and tightly clamped for a secure grip.

Faster and more efficient drilling: Our 135° Split Point & Twist Design features a fast cutting point that is automatically centered and penetrates quickly with less pressure, reducing walking. The fully ground drill bit has a sharp and durable cutting edge, while the twist design allows for clear chips to be removed faster.

Durable and long-lasting: Our Enhanced M35 Alloy Material contains 5% Cobalt, which increases wear resistance and durability. Made with industry-grade 6542 high-speed steel, our drill bit set is harder than 4241 HSS used in other similar drill bit sets.

Twist Drill Bits: Drilling Diameter: 3.3mm / 0.13"; Flute Length: 35mm / 1.38";Overall Length: 60mm / 2.36". Spiral chip space design for fast and clean chip removal. Sharp cutting edge provides smooth cutting and no glitches.

Wide Applications: Suitable for precision cutting of stainless steel, alloy steel, carbon steel, tool steel non-ferrous metal, copper, plastics, etc.. Designed for drilling abrasive materials when drilling accuracy must be maintained. Can be used in high temperature drilling applications.

Material: Constructed from YG10X carbide (tungsten steel), the drill bit is hardened up to 91.5HRA, wear resistance, corrosion resistance, heat resistance, and the bending strength is greater than or equal to 2800 N/mm2.

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

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M or USCTI - United States Cutting Tool Institute drill standards

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

[High Speed Spiral Design]: This twist drill bits adopts a high speed spiral design, the drilling speed is significantly faster than standard drill bits, and the flutes help reduce friction and heat

[Make Drilling More Labor Saving]: The cutting edge of this spiral drill bit is hardened and polished to achieve the purpose of sharpness, the longer size allows you to drill more labor saving

[5 Popular Sizes]: This HSS drill bit set includes 5 most popular drill bits with diameters of 2mm, 3mm, 3.5mm, 4mm, 5mm, and lengths of 150mm to 160mm

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI)

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

Quality high speed steel ensures the bits super hard, sharp and cutting effectively with impressive cutting performance in metal, plastic, and wood etc with long tool life

All drill dimensional & tolerances conform to ASME/ANSI B94.11M or USCTI - United States Cutting Tool Institute drill standards

Fully ground process ensures excellent chips moving, and 135 deg chisel angle with split point provide accuracy start for quick penetration without Walking and less Logging

❤Premium Material: Twist drill bits are made from high-speed steel. High speed steel have a high hardness for fast, smooth cutting of plywood, hard wood and soft wood, swift bore. Comes in a sturdy case with a comfortable grip handle, precision ground for clean cuts and easier fastening.

❤Package: It includes 5 sizes in one drill bit set (2mm,3mm,3.5mm,4mm,5mm), which meet your different needs perfectly. This set includes 5 pieces drill bit in different sizes of the most popular drill bits.

❤Good Performance: Extra long cutting edge allows you using these bits to drill deep holes. Sharp twisted drill bits will make the drilling easier and more effortless. They are great for most drilling jobs and materials such as aluminum, wood, plastics.

【Twist Drill Bit Set】Come with 8 pieces drill bit in different sizes of the most popular drill bits, can meet your varied requirements! 8 sizes: 4, 4.2, 4.5, 5, 5.2, 6, 8, 10mm OD.

【HSS Twist Bits】Twist drill bits are made from High-speed Steel for high hardness and durability, not easy to bend. Sturdy and longer life!

【Extra Long Bit】Extra long cutting edge great for general purpose use on hand drills and allows you using these bits to drill deep holes. Length: 200mm (about 7.9'')

The boxed set includes 6pcs totally: 6pcs drill bits diameter 20/25/35/50/75/100mm(4/5",1",1-3/8",2",3",4")

Core bits: Diameter 20-100mm,35mm Max working depth,10mm Diamond height, Total Length 60mm,5/8"-11 thread;

The drilling Bits sets are used for Dry/wet drilling porcelain tile, granite, marble, brick and all similar material.The boxed set can solve most of the daily needs.