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10 Best Step Drill Bits 2025 in the United States
#1
Winner
AugTouf toolant Gigantic Step Drill Bit(Pro Max), 1/4'' - 2-1/2''(15 Step Size) Large Step Bit, 1/2'' Shank Unibit Step Drill Bit for Metal, Aluminum, Wood, 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
9.8
Chosen by1,183
Material
Shank Type
Coating
Most important from
1992 reviews
#2
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
The NEIKO 10181A Step Drill Bit Set is a versatile tool designed for drilling clean and precise holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal. Made from high-speed steel with a titanium nitride coating, these step drill bits offer durability and strength, ensuring they can handle tough drilling tasks without wearing out quickly. The set includes three bits that together provide 31 different step sizes, making it suitable for a wide range of applications.
Rating
9.6
Material
Coating
Most important from
23389 reviews
#3
NEIKO 10174A Quick Change Spiral Grooved Step Drill Bit | 10 Step Drill Bit Sizes in One - 1/4" to 1-3/8" | High-Speed Steel and Titanium Nitride Coating | Two-Flute Design
The NEIKO 10174A Quick Change Spiral Grooved Step Drill Bit is a versatile tool designed for those who need a reliable solution for drilling clean holes in various materials. With a size range that includes ten different diameters from 1/4 inch to 1-3/8 inches, it allows users to tackle a wide array of tasks without needing multiple bits. Its high-speed steel construction ensures durability and strength, making it suitable for both professional and DIY projects.
Rating
9.4
Material
Number of Steps
Coating
Most important from
23389 reviews
Top 10 Best Step Drill Bits 2025 in the United States
#1
Winner
9.8 score
AugTouf toolant Gigantic Step Drill Bit(Pro Max), 1/4'' - 2-1/2''(15 Step Size) Large Step Bit, 1/2'' Shank Unibit Step Drill Bit for Metal, Aluminum, Wood, Plastic
AugTouf toolant Gigantic Step Drill Bit(Pro Max), 1/4'' - 2-1/2''(15 Step Size) Large Step Bit, 1/2'' Shank Unibit Step Drill Bit for Metal, Aluminum, Wood, 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
Chosen by 1183 this week
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
NEIKO 10174A Quick Change Spiral Grooved Step Drill Bit | 10 Step Drill Bit Sizes in One - 1/4" to 1-3/8" | High-Speed Steel and Titanium Nitride Coating | Two-Flute Design
NEIKO 10174A Quick Change Spiral Grooved Step Drill Bit | 10 Step Drill Bit Sizes in One - 1/4" to 1-3/8" | High-Speed Steel and Titanium Nitride Coating | Two-Flute Design
Material: High Speed Steel
Size Range: 1/4 to 1-3/8 inches
Number of Steps: ten
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
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Up to 22% off
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
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
toolant Four Spiral Flute Cobalt Step Drill Bit(Pro), 3/16" - 7/8"(12 Step Size) Impact Ready Unibit Step Drill Bit, 1/4" Hex Shank Step Bit for Metal, Stainless Steel, Aluminum, Plastic
toolant Four Spiral Flute Cobalt Step Drill Bit(Pro), 3/16" - 7/8"(12 Step Size) Impact Ready Unibit Step Drill Bit, 1/4" Hex Shank Step Bit for Metal, Stainless Steel, Aluminum, Plastic
Material: Cobalt Steel
Size Range: 3/16” to 7/8”
Number of Steps: 12
Shank Type: Hex
Coating: Titanium Aluminum Nitride
TEMO M35 Cobalt Spiral Flute Step Drill, 12 Size 3/16 Inch To 7/8 Inch, 1/4 Inch Hex Shank
TEMO M35 Cobalt Spiral Flute Step Drill, 12 Size 3/16 Inch To 7/8 Inch, 1/4 Inch Hex Shank
Material: Cobalt
Size Range: 3/16 to 7/8 inch
Number of Steps: 12
Shank Type: Hex
Coating: Uncoated
#10
7.8 score
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
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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.