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10 Best Step Drill Bits 2026 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
Milwaukee Electric - Cobalt Step BIT KIT 3PC
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.
Rating
10.0
Material
Most important from
11 reviews
#3
IRONANT Step Drill Bits, 5PCS HSS Titanium Step Drill Bit Set, 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case
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.
Rating
10.0
Material
Most important from
1834 reviews
Top 10 Best Step Drill Bits 2026 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 1431 this week
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
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
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
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
Material: high-speed steel
Size Range: 4mm to 35mm
Number of Steps: multiple steps
Shank Type: tri-flatted straight shank
Coating: titanium
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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 48-89-9254 SHOCKWAVE High Speed Steel Impact Duty Step Bit 3 pc Set
Milwaukee 48-89-9254 SHOCKWAVE High Speed Steel Impact Duty Step Bit 3 pc Set
Material: High Speed Steel
Number of Steps: 13
Shank Type: Hex
Coating: Titanium Aluminum Nitride
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
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
Material: M2 Steel
Size Range: 7/8-inch to 1-3/8-inch
Shank Type: Hex
Coating: Aluminum Titanium Nitride
Milwaukee 48-89-9221 3 Piece Step Drill Bit Set
Milwaukee 48-89-9221 3 Piece Step Drill Bit Set
Material: High Speed Steel
Shank Type: 3-Flat
Coating: Black Oxide
#10
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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.