Best Spiral Reduced Shank Drill Bits in 2026

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

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

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

Accuracy & Longevity - 135 degree split point starts drilling immediately requires less force and eliminates “walking” across the working surface. Tapered web provides strength, durability, and reduces breakage.

Three-Flat Design - Three flats on shank eliminate bit spinning in chuck. Our proprietary parabolic flute design brings optimal chip removal which reduces heat build-up.

Wide Range of Uses - Drill bits are built for general purpose applications, such as steel/copper/aluminum/zinc alloy/wood/plastics. Also, it's ideal for DIY projects and home maintenance. Durable and reliable quality.

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

[Four groove step drill] - The ordinary step drill is easy to flex during the cutting process, but the four groove step drill is more stable in the cutting. The service life is twice that of ordinary ladder drills, the drilling accuracy is significantly improved, the cutting speed is faster when drilling, and it has a unique effect on stainless steel drilling.

[M35 Cobalt High Speed Steel] - M35 cobalt high speed steel can be obtained by proper heat treatment with high hardness , high red hardness and high wear resistance. Its toughness and bending strength are higher than that of ordinary high-speed steel, which is better for hard materials.

[TiAlN] -TiAlN coating is a new coating material in recent two years. It has high hardness, high oxidation temperature, good thermal hardness, strong adhesion, low friction coefficient and low thermal conductivity coefficient.

Premium cobalt high speed steel construction for proven capability and durability to drill holes in wood, plastic, aluminum, copper, stainless, sheet metals and many other types of materials

Superior gold titanium and black nitride dual coating finish holds up lubricant better for smoother drilling, and is 80% more durable and corrosion resistant than regular black enamel finish

135° Split point design at tip increases cutting speed with self-centering feature and prevents drill walking or wobbling

Features: Cutting Edge Diameter : 12.5mm / 0.49"; Shank Diameter : 12.5mm / 0.49"; Cutting Edge Length: 102mm / 4.02"; Total Length : 150mm / 5.91"; Cutting Direction: Right Hand

High Speed Steel Tool: High-speed steel straight shank tool is good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Sharp Spiral Flutes: Provide neat and smooth cuts. High cutting edge strength, fast cutting speed. Spiral groove facilitates the export of metal chip, saving time and effort in operation.

3-Flat Shank and 135° Split Point - Three flats on shank eliminate bit spinning in chuck. 135° split point designed for clean and accurate holes, requires less force and eliminates “walking” across the working surface.

HSS - Premium high speed steel for the durability of drilling in tough materials. Proprietary parabolic flute design brings optimal chip removal and reduced thermal build-up.

Black & Gold Finish - Premium gold and black nitride dual coating provides maximum corrosion resistance and durability.

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.

High Speed Steel tool - 26mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

Reduced Shank - Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Black Oxide Finish - Black oxide treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge

High Speed Steel tool - 32mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

Reduced Shank - Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Black Oxide Finish - Black oxide treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge

【High Speed Steel tool】- 15mm / 0.59-inch cutting diameter. Cutting Edge Length: 70mm / 2.76-inch;Overall Length: 155mm / 6.1-inch. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance.

【Reduced Shank】- Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

【Black Oxide Finish】- Black oxide treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge

【Specification】13 cobalt hexagonal shank bits, including 1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm, with 1/4 hexagonal shank.

【Advantages】The hexagonal handle specially made for quick replacement of drill bits is an upgraded version. Compared with the ordinary hexagonal handle, it shows excellent performance, prevents the drill bit from peeling off the hexagonal handle, and effectively keeps the hexagonal handle locked during impact drilling. Cobalt drill bit is more durable than titanium drill bit.

【Complete grinding process and 135 ° points】 The fully ground spiral groove blowdown waste quickly reduces friction and heat, thus providing faster, cooler and more efficient drilling performance; 135 ° split point with straight handle can prevent slipping and make drilling stable and accurate. No center punch is required.

POINT DESIGN: 135° split point design increases cutting speed with self-centering feature and prevents drill bit walking or wobbling on working surface.

REDUCED SHANK with THREE FLATS: 1/2" reduced shank drill bit with tri-flat is designed to eliminate drill bits spinning in the chuck and ensures grip. Superior black oxide finish offers great wear resistance.

WIDE FLUTE: Parabolic flute design improves chips removal and prolongs drill bits life while drilling in metal and wood.

【Size】Cutting Edge Diameter : 14mm / 0.55"; Shank Diameter : 10mm / 0.39"; Cutting Edge Length: 56mm / 2.2"; Total Length : 150mm / 6"

【Hard & Durable】 Made of tungsten steel material, the twist drill bits are hard enough, anti-bending and will not fracture easily. The surface coating can better protect the drill bit sets from corrosion and espand their longlife.

【Sharper & Quicker】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.

【TITANIUM | HIGH-SPEED STEEL】: Twist Drill Bits, Jobber Length,Classic HSS Construction With Titanium Coating For Proven Capability And Durability.

【STRENGTH & DURABILITY】: Made With HSS 4341, Rock wall Hardness Level HRC 60-62.

【5PCS】:Diameter 1/2 inch, Total Length 6 inch, Working Length 4-1/2 inch.

Parameter: Cutting and Shank Dia : 2mm / 0.08", Cutting Edge Length: 25mm / 0.98", Twist Drill Total Length : 49mm / 1.93".

Short Shank Twist Drill Bit Uses: For Stainless Steel/Aluminum Alloy/Iron/Copper/Plastic/Aluminum Plates/Metal Materials etc.

How To Use: When in use, The drill bit should be perpendicular to the workpiece and oil, water, or coolant should be added to keep cool.

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

【Parameter】- Material:HSS-6542;Hardened to:65-66Hrc;Cutting Diameter:14mm /0.55inch;Shank diameter:12.7mm/0.5inch;Total Length:155mm/6.10inch

【Material】- High speed steel 6542 is designed to ensure sharp and fast execution in metal surface for clean results;14mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

【Advantage】-Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Features: Cutting Edge Diameter : 5mm / 0.2"; Shank Diameter : 5mm / 0.2"; Cutting Edge Length: 53mm / 2.09"; Total Length : 85mm / 3.35"

High Speed Steel Tool: High-speed steel straight shank tool is good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Reduced Shank: Reduced shank drill expands the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Manufactured from M2 premium grade high speed steel

For use in a wide range of materials in the iron and steel families such aluminum, iron, stainless steel and other hard metal drilling

135 degree split point tip for self-centering and reducing thrust

Parameter: Cutting and Shank Dia : 5.5mm / 0.22", Cutting Edge Length: 55mm / 2.17", Twist Drill Total Length : 93mm / 3.66".

Short Shank Twist Drill Bit Uses: For Stainless Steel/Aluminum Alloy/Iron/Copper/Plastic/Aluminum Plates/Metal Materials etc.

How To Use: When in use, The drill bit should be perpendicular to the workpiece and oil, water, or coolant should be added to keep cool.

HSS HIGH SPEED STEEL: The high-speed steel material these bits are made of are designed to ensure sharp and fast execution in any material for clean results while making the bit long-lasting, durable, and wear resistant.

135° SPLIT POINT DRILL TIP: The 135-degree split point increases cutting speed with self-centering with no pilot hole and prevents walking while clearing chips and particles faster.

1/2” TRI-FLAT SHANKS: The tri-flat on the shanks of these drills are constructed for tighter chucking to maximize the hold to create precision holes.

【Parameter】- Material:HSS-6542;Hardened to:65-66Hrc;Cutting Diameter:32mm/1.26inch;Total Length:150mm/5.91inch

【Material】- High speed steel 6542 is designed to ensure sharp and fast execution in metal surface for clean results;32mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

【Advantage】-Expanding the size range capacity of a portable drill chuck; Common flute and overall length for minimal adjustment during tool changes