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10 Best Step Drill Bits 2025 in the United States
#1
Winner
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.
#2
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
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.
Rating
9.7
Material
Size Range
Shank Type
Most important from
1641 reviews
#3
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
The Toolant Gigantic Step Drill Bit (Pro) is designed to cater to a wide range of drilling needs, providing versatility with its 15 step sizes that range from 1/4" to 2-1/2". This makes it suitable for drilling large holes without the need for multiple bits, saving time and effort. The high-speed steel (HSS) construction ensures durability and efficiency when working with various materials like metal, aluminum, plastic, and wood.
Rating
9.1
Material
Shank Type
Coating
Most important from
2112 reviews
Top 10 Best Step Drill Bits 2025 in the United States
#1
Winner
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
Material: Alloy Steel
Size Range: #1 to #9
Number of Steps: 6
Shank Type: Straight
Coating: Black Oxide
Chosen by 1172 this week
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
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
Material: High Speed Steel (HSS)
Number of Steps: 50
Shank Type: Straight
Coating: Titanium
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
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
Material: High Speed Steel
Size Range: 1/4" to 2-1/2"
Number of Steps: 15
Shank Type: Tri-Flat
Coating: Titanium Aluminum Nitride
Milwaukee Electric - Cobalt Step BIT KIT 3PC
Milwaukee Electric - Cobalt Step BIT KIT 3PC
Material: Cobalt
Shank Type: Straight
Coating: Uncoated
IRONANT Step Drill Bits, 5PCS HSS Titanium Step Drill Bit Set, 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case
IRONANT Step Drill Bits, 5PCS HSS Titanium Step Drill Bit Set, 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case
Material: High Speed Steel
Size Range: 50 sizes across 5 bits
Shank Type: 3-Flat
Coating: Titanium
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Up to 5% off
Irwin Tools IRWIN Step Drill Bit Set, General Purpose, 4-Piece (10225)
Irwin Tools IRWIN Step Drill Bit Set, General Purpose, 4-Piece (10225)
Material: High Speed Steel
Shank Type: Hex
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
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
Material: High Speed Steel
Size Range: 50 sizes
Number of Steps: 50
Shank Type: Hex
Coating: Titanium Nitride
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
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
Material: High Speed Steel
Size Range: 5 hole sizes
Shank Type: Straight
Coating: Nitridation
#10
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
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
Material: High-speed steel
Size Range: 31 step sizes
Number of Steps: 31
Shank Type: Hex
Coating: Titanium nitride
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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.