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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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THINKWORK
THINKWORK

THINKWORK 5 Pcs Four Spiral Flute Step Drill Bit Set & 5 Pcs Countersink Drill Bits with Tool Box, Nitriding HSS Drill Bits for Metal, Aluminum, Wood, Plastic

#1
Top Rated in the USA
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

12%OFF

Fast Delivery
10.0
1 978 reviews

Item still has Pre-Tariff price

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1 269 bought in past month

Sponsored

THINKWORK
THINKWORK

THINKWORK 5 Pcs Four Spiral Flute Step Drill Bit Set & 5 Pcs Countersink Drill Bits with Tool Box, Nitriding HSS Drill Bits for Metal, Aluminum, Wood, Plastic

#2
Milwaukee
Milwaukee

Born in the USA

Milwaukee Electric - Cobalt Step BIT KIT 3PC

Fast Delivery
10.0
11 reviews

Solid Value from a Trusted Brand

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1 167 bought in past month
Last Purchases
E***a
Las Vegas, NV
1d ago
Is***la
Philadelphia, PA
19h ago
Sa***el
Orlando, FL
5h ago
#3
Milwaukee
Milwaukee

Born in the USA

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

20%OFF

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10.0
143 reviews

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1 065 bought in past month
Good materials and workmanship at a great rate.
EmmaAustin, TX
#4
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

10%OFF

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9.1
17 593 reviews

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963 bought in past month
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#5
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

Fast Delivery
7.9
23 861 reviews

Solid Value from a Trusted Brand

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861 bought in past month
#6
Irwin Tool
IRWIN

Born in the USA

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

Fast Delivery
7.6
89 reviews

Solid Value from a Trusted Brand

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759 bought in past month
#7
Milwaukee
Milwaukee

Born in the USA

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

12%OFF

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7.6
51 reviews

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657 bought in past month
#8
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

14%OFF

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7.6
2 184 reviews

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555 bought in past month
#9
Greenlee G
Greenlee

Born in the USA

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

14%OFF

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7.3
28 reviews

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453 bought in past month
#10
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

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7.0
2 016 reviews

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351 bought in past month

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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
2 016
verified reviews

Solid Value from a Trusted Brand

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249 bought in past month
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

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550
verified reviews

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147 bought in past month
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

Fast Delivery
23 861
verified reviews

Solid Value from a Trusted Brand

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45 bought in past month
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IRONANT 3P
IRONANT

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

10%OFF

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1 978
verified reviews

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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)

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894
verified reviews

Solid Value from a Trusted Brand

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Our Top Picks

#1

Winner

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

Rating
10.0
Chosen by1,269
Material

Most important from
1978 reviews

Material
These bits are of very good quality and cut very well, even on steel.

The IRONANT Step Drill Bits set includes 5 high-speed steel (HSS) bits with a titanium coating, which enhances their sharpness and durability. These bits are designed with a 118° split point tip and a dual-flute design, promoting faster cutting speeds and preventing the bit from wandering during use. This design also facilitates quicker chip removal, making your drilling tasks more efficient.

The set offers 50 different sizes across the 5 bits, providing versatility for a wide range of DIY projects. The 3-flat shank type ensures a more secure grip in the drill chuck, reducing slippage during operation. The titanium finish further adds to the durability, making the bits suitable for drilling into materials like plastic, aluminum, and iron.

However, they are not recommended for use with stainless steel or wood, which could limit their application for some users. The inclusion of a well-organized aluminum case is a practical feature for storage and transportation. This set is well-suited for DIY enthusiasts looking for a versatile and durable solution for drilling various types of sheet metal, though it may not be ideal for more demanding materials like stainless steel.

Rating
10.0
Chosen by1,269
Material

Most important from
1978 reviews

Material
These bits are of very good quality and cut very well, even on steel.
#2

Milwaukee Electric - Cobalt Step BIT KIT 3PC

Rating
10.0
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
10.0
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.
#3

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.

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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