Top 10 Best metric step drill bit in 2026

Last Updated - 6/6/2026

🏆Best Choice

NEIKO

NEIKO 10198A Step Drill Bit Set | 5 Piece, 4mm- 35mm | Metric Titanium High Speed Steel Unibit, Stepper Cone Drill Bit | Two Flute Step Down Bits, 135 Degree Point

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•135° SPLIT POINT TIP: Each step down drill bit is made with high strength HSS and is black and cobalt-treated for added durability to ensure long service life and longevity. The design of the tip angle increases cutting speed with self-centering and prevents walking off the surface of workpiece.
•2 FLUTE DESIGN: This metric stepper drill bit has a two-flute design that clears chips faster, smoother, and allows particles to escape easily making cleaner holes at any worksite.
•TRI-FLATTED SHANK: Each unibit optimally fits into power tools such as impact drill chucks securely and eliminates slip for higher efficiency of output.
•HSS STEP BIT: This step up drill bit set cuts through steel, sheet metal, wood, plexiglass, enlarges a hole, and other surfaces creating relatively clean holes with only a small amount of pressure and deburrs as you drill.
•MULTIPLE HOLE DRILL BIT: 6 millimeter shank: (9 steps- 4, 5 , 6, 7, 8 ,9 10, 11, 12 mm),(5 steps- 4, 6, 8, 10, 12 mm) and 8mm shank (7 steps- 6, 8, 10, 12, 14, 16, 18 mm),(10 steps- 4, 6, 8, 10, 12, 14, 16, 18, 20, 22mm) and 10mm shank (13 steps- 6, 8, 10, 13, 16, 18, 20, 22, 25, 28, 30, 32, 35 mm).

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$31.99

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THINKWORK

THINKWORK Four Spiral Flute Step Drill Bit Set (Metric), 5 Pcs HSS Step Drill Bits (4mm-35mm) Unibit Step Drill Bit, 6mm and 10mm Shank Step Bits for Aluminum, Wood, Plastic, Metal

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•ENHANCED DURABILITY: Our industrial-grade step drill set is meticulously crafted from high-quality alloy steel and undergoes multiple manufacturing processes. Each drill bit is carefully inspected at the factory to ensure superior quality and longevity.
•IMPROVED STABILITY: Unlike ordinary step drills that often suffer from deflection during cutting, our four-flute step drill bit provides exceptional stability. This feature enhances accuracy and cutting speed, making it perfect for stainless steel drilling. In fact, it offers a significantly longer service life compared to regular step drills.
•5PCS NITRIDING STEP BIT KIT: Our 5-piece nitriding step bits set includes a range of sizes to cater to various drilling needs. The set comprises step bits with diameters of 4mm-12mm (5 steps), 4mm-12mm (9 steps), 4mm-22mm (10steps), 6mm-18mm (7 steps), and 6mm-35mm (4 Popular steps). All these bits come in a sturdy blow molded case for easy storage and transport.
•VERSATILE DRILLING CAPABILITY: With its powerful drilling capability, our step drill is suitable for piercing holes in various materials, including thin metal, copper, aluminum, iron, carbon steel, wood, and plastic. It's an essential addition to any DIY enthusiast's toolbox and can be utilized for a wide range of household projects.
•USER-FRIENDLY DESIGN: Our step drill bits feature laser-engraved step sizes, ensuring clear visibility and eliminating concerns about wear and tear during use. This design element enhances convenience and accuracy, making the drilling process easier and more efficient.
•DEDICATED CUSTOMER SERVICE: While our products undergo stringent quality inspections, unforeseen issues caused by accidental factors may occur. In such cases, we are committed to providing professional customer service. If you encounter any quality problems, please contact us via Amazon, and we will promptly replace the defective item with a new one.

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$35.99

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Tworider

Tworider 3pcs Metric Step Drill Bit, Hss Step Drill Bit Set High Speed Steel Step Bits Set (Metric 4-12mm, 4-20mm and 4-32 Mm) Cone Metal Drill Bits for Plastic, Wood, Stainless Steel Sheet Metal

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•【Drill Bit Set contain 3 size】：4-12mm, 4-20mm and 4-32 mm, Supplied with a portable fabric bag.
•【Double groove design】：Provide faster and smoother drilling, provide less pressure, and cut wood, plastic and other surfaces with a thickness of less than 5mm. The stepped cone drill is designed to accurately drill holes of different sizes from 4 mm to 32 mm in diameter, with the best speed
•【widely used】：The ability and durability of high-speed steel with titanium coating to drill holes in plastic, aluminum, copper and many other types of metal plates have been proved. Titanium drill bits are especially suitable for processing copper and aluminum parts, die steel, cast iron, iron and other metal materials.
•【Quick Assemble】: 1/4" hex shank work with most drill or drills with 1/4" chuck,makes for easy, convenient, and quick stepper bit switches and is compatible with impact ready power tools.
•【Sizes】： 15 Step Bit: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm) 9 Step Bit: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 5 Step Bit: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)

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$9.99

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STROTON

STROTON 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Premium M35 5% 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 Step 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.
•[4-32mm] 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)

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$28.49

$32.89

-13%

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Fongmore

Fongmore 4-32mm HSS Titanium Coated Step Drill Bit High Speed Steel 1/4" Hex Shank Quick Change Cone Drill Bit Hole Cutter for Metal Plastic Wood

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•HSS Titanium Coating: The step drill has excellent sharpness and durability due to its high speed steel material and titanium coating.
•X-type 118° split point tip design, which can speed up the cutting speed, effectively reduce the drill bit slippage to prevent walking, more efficient drilling.
•Quick change 1/4-inch hex shank makes for easy, convenient bit switches and is compatible with impact ready power tools.
•Widely Application: Ideal for drilling holes in plastic, aluminum, iron and many other types of sheet metal (Not recommended for stainless steel or any other harder metal).
•1 piece HSS Groove Step Drill Bit 4-32mm. 1/4" Hex shaft drives are suitable for all kinds of for home DIY power drills.

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$7.69

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Fongmore

Fongmore 3Pcs 1/4" Hex Shank Drive Quick Change High Speed Steel Titanium Step Drill Bit Short Length Drill Bits for Hole Drilling 3-12mm 4-12mm 4-20mm

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•HSS Titanium Coating: The step drill has excellent sharpness and durability due to its high speed steel material and titanium coating.
•5 step drill bit: 4-12 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm) 9 step drill bit: 4-20 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm ) 10 step drill bit: 3-12 mm (3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm)
•Quick change 1/4-inch hex shank makes for easy, convenient bit switches and is compatible with impact ready power tools.
•Widely Application: Ideal for drilling holes in plastic, aluminum, iron and many other types of sheet metal (Not recommended for stainless steel or any other harder metal).
•Work as tapered drill bit, step up bit, step drill bit, step bit, step drill bits for metal, step drill, step drill bit set, step drill bits.

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$6.99

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uxcell

uxcell Step Drill Bit HSS 3mm to 13mm 11 Sizes Titanium Coated Straight Flutes Hex Shank for Metal Wood Plastic

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Shank Type: 6.3mm Hex Shank; Material: High Speed Steel with Titanium Coated; Drilling Diameters: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm.
•This step drill bit is durable and strong enough to punch and drill clean holes in materials like metal, wood, etc.. It can also help to enlarge existing holes and clean edges.
•It is Great for drilling holes for iron, metal, aluminum, copper, wood, plastic, PVC board and many other types of sheets.
•Suitable for hand-held drilling rigs, drilling machines, milling machines and machining centers, for metal sheet, maintenance and modification, bridge doors and windows, home appliances, etc..
•Note: High temperature will affect the working life, please use coolant while drilling on metals to ensure the drill bit working properly. Please keep it properly preserved. Avoid falling the bits from high place.

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$7.49

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Witwocky

Witwocky Step Drill Bits, 5PCS (44 Sizes) Metric HSS Step Unibit Drill Bit Set with Aluminum Case, Double Cutting Blades, High-Speed Steel, Multiple Hole Stepped Up Bits for DIY Lovers

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•44 Sizes: The step drill bits set includes 5 standard metric bits that can replace 44 individual drill bits.
•Titanium Coating: Our high-speed steel drill bits, fortified with a titanium coating, offer exceptional durability and maintain sharpness even through demanding tasks. The titanium coating increases wear resistance and minimizes friction, resulting in cooler operation.
•PRODUCT Design: The split point tip, set at a 118-degree angle, significantly enhances wear resistance, making the drill bits long-lasting and efficient. The innovative two-flute design facilitates smoother cutting and enables easy evacuation of material particles, promoting cleaner and more precise drilling operations.
•WIDELY Application: Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron, and many other types of sheet metal(recommended to add coolant or water when drilling metal plates and the speed should not be too high).
•CONVENIENT Storage: All the bits come in a well-organized case for easy transport and storage.

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$19.99

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Hyamass

Hyamass Cobalt Steel Step Drill Bit, M35 Grade 5% Cobalt HSS-Co,9 Size from 4mm to 12mm, Double Straight Flutes and 1/4 Inch Hex Shank,Unibit Step Bit for Hole Drilling in Stainless Steel,Metal,Copper

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Professional-Grade Cobalt Steel Step Drill Bit Set】Crafted with M35 HSS-Co alloy containing 5% cobalt, this cobalt step drill bit set outperforms standard drill bits with 300% longer lifespan. The added cobalt enhances heat resistance for sustained drilling in stainless steel/steel/metal without warping
•【9 Precision-Sized Bits in 1 Compact Kit】Replace multiple drill bit sets with our 9-step design (4mm-12mm). Laser-etched size markings ensure accurate hole drilling for electrical conduits, plumbing pipes, and sheet metal work. Ideal drill bit kit for mechanics and DIYers needing countersunk holes
•【Hex Shank + Dual Flutes for Maximum Efficiency】1/4" hex shank prevents slippage in drill chucks, delivering 68% higher torque transmission than round shanks. Double straight flutes accelerate swarf removal during high-speed steel/metal drilling operations
•【Multi-Material Mastery: From Copper to Carbon Steel】Engineered as the ultimate drill bit set for metal, effectively cutting through stainless steel (304/316), aluminum, copper, iron, and brass. Self-starting tip creates burr-free holes in 1mm-5mm thickness materials
•【Industrial Durability Meets Workshop Convenience】Hardened M35 cobalt step drill bit set maintains sharpness through 15,000+ RPM operations. Includes protective storage case - your complete countersunk drill bit kit for garage, auto repair, and metal fabrication

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$7.99

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uxcell

uxcell Step Drill Bit HSS 4241 4mm to 12mm 5 Sizes Titanium Coated Straight Flutes Hex Shank for Metal Wood Plastic

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Shank Type: 6mm Hex Shank; Material: HSS 4241; Drilling Diameters: 4mm/0.16”, 6mm/0.24”, 8mm/0.3”, 10mm/0.4”, 12mm/0.47”.
•This step drill bit is durable and strong enough to punch and drill clean holes in materials like metal, wood, etc.. It can also help to enlarge existing holes and clean edges.
•It is Great for drilling holes for iron, metal, aluminum, copper, wood, plastic, PVC board and many other types of sheets.
•Suitable for hand-held drilling rigs, drilling machines, milling machines and machining centers, for metal sheet, maintenance and modification, bridge doors and window, home appliances, etc..
•Note: High temperature will affect the working life, please use coolant while drilling on metals to ensure the drill bit working properly. Please keep it properly preserved. Avoid falling the bits from high place.

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$7.09

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