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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
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

11%OFF

Fast Delivery
10.0
1 569 reviews

Item still has Pre-Tariff price

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1 181 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
10.0
136 reviews

Solid Value from a Trusted Brand

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1 079 bought in past month
Last Purchases
Be***in
Atlanta, GA
3d ago
Mi***el
Houston, TX
2d ago
Ale***der
Houston, TX
2d ago
#3
Milwaukee
Milwaukee

Born in the USA

Milwaukee Electric - Cobalt Step BIT KIT 3PC

Fast Delivery
9.1
11 reviews

Solid Value from a Trusted Brand

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977 bought in past month
High-quality product without the high price tag.
LilyNashville, TN
#4
toolant Gi
AugTouf

toolant Gigantic Step Drill Bit(Pro), 1 4" - 2-1 2"(15 Step Size), 1 2" Shank Unibit Step Drill Bit for Metal, Aluminum, Plastic

Fast Delivery
8.8
2 104 reviews

Solid Value from a Trusted Brand

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875 bought in past month
Curated products trusted bytrust us brands
#5
Milwaukee
Milwaukee

Born in the USA

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

Fast Delivery
7.9
299 reviews

Solid Value from a Trusted Brand

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773 bought in past month
#6
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

33%OFF

Fast Delivery
7.9
1 569 reviews

Item still has Pre-Tariff price

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671 bought in past month
#7
Greenlee G
Greenlee

Born in the USA

Greenlee GSBSET3 Step Bit Set (#1, #4, #9)

Fast Delivery
7.6
27 reviews

Solid Value from a Trusted Brand

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569 bought in past month
#8
Irwin Tool
IRWIN

Born in the USA

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

Fast Delivery
7.3
88 reviews

Solid Value from a Trusted Brand

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467 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
526 reviews

Solid Value from a Trusted Brand

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365 bought in past month
#10
ZELCAN Ste
ZELCAN

Born in the USA

ZELCAN Step Drill Bit Set, 5PCS Four Spiral Flute Step Bits for Metal, 50 Sizes Titanium-Coated HSS Drill Bits with 1 4" Hex Shank for Stainless Steel Aluminum Wood Plastic

Fast Delivery
7.0
13 057 reviews

Solid Value from a Trusted Brand

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263 bought in past month

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NEIKO 1018
NEIKO

Born in the USA

NEIKO 10181A Step Drill Bit Set, 3 Piece, Spiral Grooved for Faster Drilling, Step Bits for Stainless Steel, Metal, Wood, Plastic, Unibit Cone Drill Bits with 31 Step Sizes Total

6%OFF

Fast Delivery
23 673
verified reviews

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161 bought in past month
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

7%OFF

Fast Delivery
1 982
verified reviews

Item still has Pre-Tariff price

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59 bought in past month
Milwaukee
Milwaukee

Born in the USA

Milwaukee (MLW48899223) 4-Piece Step Drill Bit Set

Fast Delivery
56
verified reviews

Solid Value from a Trusted Brand

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Explore other best-rated products in this category
Irwin Tool
IRWIN

Born in the USA

Irwin Tools IRWIN Step Drill Bit, 3 16-Inch to 7 8-Inch, Cobalt Alloy Steel, 3 8-Inch Shank (10234CB)

19%OFF

Fast Delivery
888
verified reviews

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NEIKO 1019
NEIKO

Born in the USA

NEIKO 10194A Titanium Step Drill Bit, High-Speed Alloy-Steel Bit, Hole Expander for Wood and Metal, 10 Step Sizes from 1 4 Inch to 1 3 8 Inches

Fast Delivery
23 673
verified reviews

Solid Value from a Trusted Brand

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Our Top Picks

#1

Winner

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

Rating
10.0
Chosen by1,181
Material
Size Range
Shank Type

Most important from
1569 reviews

Material
The drill bits deliver precise and easy material removal, making hole widening tasks smooth and controlled.
Size Range
The assortment of sizes combined with the sturdy storage box adds great convenience for current and future projects.
Shank Type
Designed to fit standard drills, the bits maintain control and avoid slipping during use.

The IRONANT Step Drill Bit Set offers a solid choice for those needing versatile drill bits for light to medium metalwork and DIY projects. Made from high-speed steel (HSS) with a titanium coating, these bits promise good sharpness and durability, which helps them stay sharper longer than regular bits. The set includes 5 pieces with a total of 50 size steps, making it flexible enough to handle a wide range of hole sizes without needing multiple individual bits.

The straight shank design fits most standard drills, and the 118° split point tip combined with a spiral dual-flute design helps speed up drilling while preventing the bit from slipping or wandering off target. It also clears metal chips efficiently, which keeps the drilling smooth. The bits work well on materials like plastic, aluminum, and softer metals, but they are not suitable for tougher metals such as stainless steel, which limits their use if you often work with harder materials.

The included aluminum case is a nice touch, keeping the bits organized and easy to store. If you want a reliable, multi-size set for general metal and plastic drilling tasks, this set is convenient and performs well. However, if your projects require drilling harder metals or very precise holes, you might need to look for bits designed specifically for those tougher conditions.

Rating
10.0
Chosen by1,181
Material
Size Range
Shank Type

Most important from
1569 reviews

Material
The drill bits deliver precise and easy material removal, making hole widening tasks smooth and controlled.
Size Range
The assortment of sizes combined with the sturdy storage box adds great convenience for current and future projects.
Shank Type
Designed to fit standard drills, the bits maintain control and avoid slipping during use.
#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
9.1
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
9.1
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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