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Top-10 Step Drill Bits
Loved in the USA

Handpicked for quality & trusted by thousands of customers

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KAYGO M35
KAYGO

KAYGO M35 Step Drill Bit for Metal, 3/16 to 7/8 inch Step Drill Bits for Stainless Steel Aluminum Wood Plastic,1/4 -inch Hex Shank,Spriral Drouble-Fluted

#1
Top Rated in the USA
Irwin Tool
IRWIN

Born in the USA

Irwin Tools IRWIN Step Drill Bit Set, General Purpose, 4-Piece (10225)

Fast Delivery
10.0
88 reviews

Solid Value from a Trusted Brand

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1 412 bought in past month

Sponsored

KAYGO M35
KAYGO

KAYGO M35 Step Drill Bit for Metal, 3/16 to 7/8 inch Step Drill Bits for Stainless Steel Aluminum Wood Plastic,1/4 -inch Hex Shank,Spriral Drouble-Fluted

#2
Milwaukee
Milwaukee

Born in the USA

Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)

Fast Delivery
9.7
140 reviews

Solid Value from a Trusted Brand

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1 310 bought in past month
Last Purchases
Da***el
Las Vegas, NV
4d ago
Is***la
Houston, TX
1d ago
Seb***ian
Los Angeles, CA
3h ago
#3
Milwaukee
Milwaukee

Born in the USA

Milwaukee Electric - Cobalt Step BIT KIT 3PC

Fast Delivery
8.5
11 reviews

Solid Value from a Trusted Brand

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1 208 bought in past month
Outstanding value—quality exceeds the price.
WilliamNashville, TN
#4
IRONANT St
IRONANT

IRONANT Step Drill Bits, 5PCS HSS Titanium Step Drill Bit Set, 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case

23%OFF

Fast Delivery
8.2
1 739 reviews

Item still has Pre-Tariff price

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1 106 bought in past month
Curated products trusted bytrust us brands
#5
IRONANT 3P
IRONANT

IRONANT 3PCS Step Drill Bit Set, HSS Titanium Step Drill Bits for Metal, 28 Sizes Stepper Up Bits with Portable Bag

Fast Delivery
7.9
1 739 reviews

Solid Value from a Trusted Brand

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1 004 bought in past month
#6
IRONANT St
IRONANT

IRONANT Step Drill Bits, 5PCS Spiral Grooved HSS Titanium Step Drill Bit Set, 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case

20%OFF

Fast Delivery
7.6
1 739 reviews

Item still has Pre-Tariff price

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902 bought in past month
#7
NEIKO 1019
NEIKO

Born in the USA

NEIKO 10197A Step Drill Bit Set, 5 Pc Step Bit for Metal, 50 SAE Sizes Total, 1 8” – 1-3 8”, SAE Titanium High Speed Steel Unibit, Stepper Cone Drill Bit, Two Flute Step Down Bits, Step Up Drill Bits

15%OFF

Fast Delivery
7.6
23 762 reviews

Item still has Pre-Tariff price

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800 bought in past month
#8
NEIKO 1019
NEIKO

Born in the USA

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

15%OFF

Fast Delivery
7.3
23 762 reviews

Item still has Pre-Tariff price

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698 bought in past month
#9
Jerax tool
Jerax tools

Jerax tools 1 4 to 1-3 8 Inch Step Drill Bit Straight Grooved Double Fluted, M2 High Speed Steel Drill bits for Hole Drilling in Stainless Steel, Copper, Aluminum, Wood, Plastic

Fast Delivery
7.0
543 reviews

Solid Value from a Trusted Brand

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596 bought in past month
#10
Klein Tool
KLEIN TOOLS

Klein Tools QRST15 Step Drill Bit, Quick Release Spiral Double-Fluted, 7 8 to 1-3 8-Inch, Hex Shank, Cut Steel, Wood, Plastic, Aluminum

Fast Delivery
7.0
2 001 reviews

Solid Value from a Trusted Brand

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494 bought in past month

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Milwaukee
Milwaukee

Born in the USA

Milwaukee 48-89-9212 Step Bit #12 7 8" - 1-3 8"

10%OFF

Fast Delivery
319
verified reviews

Item still has Pre-Tariff price

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392 bought in past month
Milwaukee
Milwaukee

Born in the USA

Milwaukee 48-89-9221 3 Piece Step Drill Bit Set

Fast Delivery
33
verified reviews

Solid Value from a Trusted Brand

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290 bought in past month
IRONANT Ti
IRONANT

IRONANT Titanium Step Drill Bit, 1 4" to 1-3 8" Spiral Flute Step Bit for Metal, 10 Sizes HSS Step Drill Unibit

15%OFF

Fast Delivery
1 739
verified reviews

Item still has Pre-Tariff price

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188 bought in past month
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Klein Tool
KLEIN TOOLS

Klein Tools KTSB15 Step Drill Bit #15 Double Fluted 7 8 to 1-3 8-Inch with Easy-to-Read Step Markings and Targets, 3 8-Inch Hex Shank

12%OFF

Fast Delivery
2 001
verified reviews

Item still has Pre-Tariff price

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86 bought in past month
Milwaukee
Milwaukee

Born in the USA

Milwaukee 48-89-9254 SHOCKWAVE High Speed Steel Impact Duty Step Bit 3 pc Set

12%OFF

Fast Delivery
49
verified reviews

Item still has Pre-Tariff price

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Our Top Picks

#1

Winner

Irwin Tools IRWIN Step Drill Bit Set, General Purpose, 4-Piece (10225)

Rating
10.0
Chosen by1,412
Material
Size Range
Number of Steps

Most important from
88 reviews

Material
Using a good cutting oil can protect your investment, especially when cutting through 1/8 inch mild steel.
Size Range
The quality expected from Irwin, delivering reliable performance in drilling up to 1 and 3/8 inches.
Number of Steps
This set proves to be useful with various sizes and step heights, making it worth the money by reducing the need for single unit workarounds.

The IRWIN Step Drill Bit Set (10225) is a versatile 4-piece set designed for general-purpose use, making it suitable for both DIY enthusiasts and professionals. One of its standout features is the high-speed steel (HSS) material, known for its durability and long-lasting performance.

The set includes four of the most popular Unibit sizes, ensuring a wide range of applications, and the single-flute cutting edge provides precise, clean, and round holes, which is ideal for a smooth finish. Additionally, the laser-etched size markings make it easy to select the right drill bit, enhancing user convenience. The hex shank type offers a secure grip in the drill chuck, preventing slipping during use, and the SpeedPoint tip eliminates the need for a pilot hole, allowing for quick and efficient starts without 'walking' on the material.

The non-skid, self-starting tips further add to its reliability, minimizing the risk of skidding. Some users might find the limited number of steps a drawback if they require more precision in size options. Additionally, while the HSS material is robust, it lacks any additional coating that could extend the lifespan of the bits further, particularly under heavy-duty use. Given its features, this product is best suited for users needing a reliable and versatile step drill bit set for various drilling tasks.

Rating
10.0
Chosen by1,412
Material
Size Range
Number of Steps

Most important from
88 reviews

Material
Using a good cutting oil can protect your investment, especially when cutting through 1/8 inch mild steel.
Size Range
The quality expected from Irwin, delivering reliable performance in drilling up to 1 and 3/8 inches.
Number of Steps
This set proves to be useful with various sizes and step heights, making it worth the money by reducing the need for single unit workarounds.
#2

Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)

The Milwaukee 48-89-9224 Step Bit 6-Piece Set is designed for users who need a variety of sizes to tackle different drilling tasks. This set includes six bits, ranging from #1 to #9, making it versatile for various applications. One of its standout features is its durability, thanks to the alloy steel construction, which offers long-lasting performance even in tough materials. The black oxide finish adds further protection against corrosion, enhancing the lifespan of the bits.

Users will appreciate the ease of handling these bits, which are designed to be user-friendly, making them suitable for both beginners and those with experience. The straight shank type allows for straightforward setup in drills, ensuring better grip and control during use.

In terms of practical application, this step bit set is ideal for DIY enthusiasts and professionals alike who need reliable bits for metal, wood, and plastic drilling. If you're looking for a solid, all-around step drill bit set with a good balance of size variety and durability, this Milwaukee set could be a great addition to your toolkit.

#3

Milwaukee Electric - Cobalt Step BIT KIT 3PC

Rating
8.5
Material

Most important from
11 reviews

Material
Great for clean drilling into carbon fiber. Always use sharp quality items to cut and drill expensive materials like carbon fiber.

The Milwaukee 48-89-9291 3-Piece Cobalt Step Drill Bit Set is designed to handle a variety of drilling tasks with precision and durability. Made from cobalt, these bits are highly durable and can stay sharp for longer periods, making them ideal for heavy-duty use. The set includes three bits (#1, #4, and #9), each with multiple steps to accommodate different hole sizes, which adds versatility to your toolkit.

The dual flute design helps in quicker and cleaner drilling by removing chips efficiently, while the rapid strike tip ensures a fast start with minimal wear and tear. The laser engraving on the bits makes it easy to identify sizes, saving you time during work. Additionally, the 3-flat secure grip shanks prevent the bits from slipping in the drill chuck, providing a stable drilling experience.

However, it's important to note that the Milwaukee bits come with a straight shank and are uncoated, which may not be as versatile as other shank types and coated options available in the market. The uncoated finish might also affect the longevity and performance when drilling into harder materials. Despite these minor drawbacks, the Milwaukee step drill bit set is an excellent choice for both professionals and DIY enthusiasts, especially those who frequently work with metal and need durable, reliable bits.

Rating
8.5
Material

Most important from
11 reviews

Material
Great for clean drilling into carbon fiber. Always use sharp quality items to cut and drill expensive materials like carbon fiber.

Buying Guide for the Best Step Drill Bits

Step drill bits are essential tools for anyone who needs to drill holes of various sizes in materials like metal, plastic, or wood. They are particularly useful for tasks that require precision and versatility, such as electrical work, plumbing, or DIY projects. When choosing the right step drill bit, it's important to consider several key specifications to ensure you get the best performance and durability for your needs.
MaterialThe material of the step drill bit is crucial because it determines the bit's durability and effectiveness. Common materials include high-speed steel (HSS), cobalt, and titanium-coated bits. HSS is suitable for general-purpose drilling in softer materials. Cobalt bits are more durable and can handle harder materials like stainless steel. Titanium-coated bits offer a balance of durability and performance, making them ideal for frequent use. Choose the material based on the type of material you will be drilling most often.
Size RangeStep drill bits come with different size ranges, indicating the range of hole diameters they can create. This is important because it determines the versatility of the bit. A bit with a wide size range can handle more tasks, reducing the need for multiple bits. For general use, a bit with a size range from 1/8 inch to 1/2 inch is often sufficient. For more specialized tasks, you might need a bit with a larger or smaller range. Consider the typical sizes of holes you need to drill and choose a bit that covers those sizes.
Number of StepsThe number of steps on a step drill bit refers to the number of incremental sizes the bit can drill. More steps mean more precision and versatility, as you can create holes of various sizes without changing bits. However, more steps can also mean a longer bit, which might be less convenient in tight spaces. For general use, a bit with 10-15 steps is usually adequate. If you need more precision or versatility, look for bits with more steps. Consider the range of hole sizes you need and the space you have to work in when choosing the number of steps.
Shank TypeThe shank type of a step drill bit affects how it fits into your drill and how securely it stays in place. Common shank types include round, hex, and tri-flat. Round shanks are standard and fit most drills, but they can slip under heavy use. Hex shanks provide a more secure fit and are less likely to slip, making them ideal for high-torque applications. Tri-flat shanks offer the best grip and are designed for heavy-duty use. Choose the shank type based on the type of drill you have and the intensity of the tasks you will be performing.
CoatingThe coating on a step drill bit can enhance its performance and longevity. Common coatings include black oxide, titanium nitride, and cobalt. Black oxide provides basic protection against rust and wear. Titanium nitride offers better durability and reduces friction, making it suitable for frequent use. Cobalt coatings are the most durable and are ideal for drilling hard materials. Choose a coating based on how often you will use the bit and the types of materials you will be drilling.

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