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High Speed Steel Step Drill Bits

High speed steel step drill bits let you drill or enlarge holes in multiple sizes with a single bit. Browse options by hole diameter range, step increments, and shank size to find a fit for your drill and project. Check each bit’s listed material compatibility and maximum workpiece thickness before choosing.

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  1. Irwin - Unibit #9 X 6 L High Speed Steel Step Drill Bit Square Shank 1 pc

    SKU: J78G5L26ZV

    Product Description

    A high-speed steel step drill bit with a square shank, offering extended durability for tough jobs.
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    Your price for this item is $83.51

  2. Irwin - 4 1/8 L High Speed Steel Letter I Drill Bit Straight Shank 1 pk

    SKU: J3Z2TYQPS7

    Product Description

    A high speed steel drill bit offering strength, heat resistance, and wear resistance for general purpose use.
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    Your price for this item is $22.42

  3. Irwin - 4 3/4 L High Speed Steel Letter Q Drill Bit Straight Shank 1 pk

    SKU: J3Z2TYQLK5

    Product Description

    A high-speed steel drill bit with straight shank offers strength, heat resistance, and wear resistance.
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    Your price for this item is $24.58

  4. Irwin - 4 1/8 L High Speed Steel Letter J Drill Bit Straight Shank 1 pk

    SKU: J3Z2TYQPPS

    Product Description

    A high speed steel drill bit with straight shank, offering strength, heat, and wear resistance.
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    Your price for this item is $22.42

  5. Irwin - 4 1/8 L High Speed Steel Letter F Drill Bit Straight Shank 1 pk

    SKU: J3Z2TYQPPW

    Product Description

    A high speed steel drill bit offering strength, heat resistance, and wear resistance for general purpose use.
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    Your price for this item is $21.67

  6. Fisch - FSN-322542 11 X 150 Millimeter High Speed Steel Woodturning Pen Drill Bit

    SKU: BY77JCRH3H

    Product Description

    A high-speed steel drill bit designed for precise, clean woodturning in both soft and hardwoods.
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    Your price for this item is $25.99

  7. Steel Grip - High Speed Steel Drill and Driver Bit Set Hex Shank 18 pc

    SKU: J363J8GR24

    Product Description

    An 18-piece high-speed steel drill and driver bit set with hex shank for versatile power tool use.
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    Your price for this item is $25.90

  8. VEVOR - Drill Bit Set,100 Pieces Drill and Driver Bit Set, Screwdriver Bit Set Suit Wood Metal Cement Drilling and Screw Driving - Black

    SKU: JJGHKKZ9CG

    Product Description

    A comprehensive black drill and driver bit set with high-strength bits for wood, metal, and cement projects.
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    Your price for this item is $29.99

  9. VEVOR - Step Drill Bit Set,1/8 - 7/8 inch,3 Pieces Step Drill Bits,1/4 inch Hex Shank,TiAlN Coating Cobalt HSS High Speed Steel - Black

    SKU: JJGHKZPHL9

    Product Description

    A durable black step drill bit set made of cobalt HSS with TiAlN coating for smooth, precise drilling.
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    Your price for this item is $35.90
    Save $9
    The previous price was $44.99

  10. VEVOR - Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding - Black

    SKU: JJGHKKVYS3

    Product Description

    A black steel core drill bit with high-precision welding, ideal for reinforced concrete and masonry applications.
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    Your price for this item is $34.99
    Save $4
    The previous price was $38.99

  11. VEVOR - Core Drill Bit, 2-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding - Black

    SKU: JJGHKKVYYV

    Product Description

    A black steel core drill bit with high-precision welding for clean drilling in concrete and brick.
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    Your price for this item is $29.99
    Save $8
    The previous price was $37.99

  12. VEVOR - Core Drill Bit, 4-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding - Black

    SKU: JJGHKKVYYT

    Product Description

    A black steel core drill bit with high-precision welding for clean drilling in concrete and masonry.
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    Your price for this item is $43.99
    Save $6
    The previous price was $49.99

  13. VEVOR - Core Drill Bit, 3 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology - Black

    SKU: JJGHKKVYY7

    Product Description

    A black steel core drill bit with high-precision welding, ideal for concrete, brick, and foam block.
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    Your price for this item is $31.99
    Save $8
    The previous price was $39.99

  14. VEVOR - Core Drill Bit, 5 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology - Black

    SKU: JJGHKKVYLK

    Product Description

    A black steel core drill bit with high-precision welding, ideal for concrete and masonry applications.
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    Your price for this item is $47.99
    Save $12
    The previous price was $59.99

  15. VEVOR - Core Drill Bit, 6 Pieces, 1/2/3/4/5/6 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread - Black

    SKU: JJGHKKVYL9

    Product Description

    A set of six black steel core drill bits with universal thread for fast, clean drilling in masonry.
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    Your price for this item is $198.90
    Save $50
    The previous price was $248.99

  16. VEVOR - Core Drill Bit, 4 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology - Black

    SKU: JJGHKKVYPF

    Product Description

    A black steel core drill bit with high-precision welding, ideal for concrete, brick, and foam block drilling.
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    Your price for this item is $39.99
    Save $10
    The previous price was $49.99

  17. VEVOR - Core Drill Bit, 8 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology - Black

    SKU: JJGHKKVYP8

    Product Description

    A black steel core drill bit with high-precision welding, ideal for concrete, brick, and foam block.
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    Your price for this item is $87.99
    Save $22
    The previous price was $109.99

  18. VEVOR - Core Drill Bit, 1-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding - Black

    SKU: JJGHKKVY6Y

    Product Description

    A black steel core drill bit with high-precision welding, ideal for concrete, brick, and foam block.
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    Your price for this item is $24.99
    Save $7
    The previous price was $31.99

  19. Irwin - 27/64 X 5 3/8 L High Speed Steel Jobber Length Drill Bit Reduced Round Shank 1 pc

    SKU: J7XJ899P3Z

    Product Description

    A high-speed steel drill bit with a reduced round shank for strength, heat, and wear resistance.
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    Your price for this item is $20.34
    Save $5
    The previous price was $25.52

  20. Irwin - Speedhammer Plus 1/4 X 12 L Steel SDS plus Drill Bit SDS Plus Shank 1 pc

    SKU: J7XJ8PKSFC

    Product Description

    A steel SDS Plus drill bit with a patented tip for up to 25% faster dust removal.
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    Your price for this item is $32.92

  21. Irwin - 45/64 X 6 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J7XJ86CLLC

    Product Description

    A high-speed steel drill bit with straight shank, designed for tough, abrasion-resistant drilling applications.
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    Your price for this item is $39.38

  22. Irwin - Unibit 1/4 to 1-3/8 in. X 6 in. L High Speed Steel Step Drill Bit Hex Shank 1 pc

    SKU: J78G5L2STG

    Product Description

    A high-speed steel step drill bit with a hex shank for precise holes in thin materials.
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    Your price for this item is $105.03
    Save $0
    The previous price was $105.16

  23. Irwin - Unibit 6 L High Speed Steel Step Drill Bit Square Shank 1 pc

    SKU: J78G5L266G

    Product Description

    A high-speed steel step drill bit with a square shank for efficient, versatile drilling tasks.
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    Your price for this item is $61.71

  24. Irwin - Unibit 1/8 to 1/2 High Speed Steel Step Drill Bit Square Shank 1 pc

    SKU: J78G5L2SQK

    Product Description

    A high-speed steel step drill bit with a square shank, ideal for precise hole drilling tasks.
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    Your price for this item is $38.66
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High speed steel step drill bits offer a convenient way to drill multiple hole sizes with a single bit, making them a versatile choice for projects involving sheet metal, plastic and other thin materials. Each bit features a stepped, cone-shaped profile with progressively larger cutting diameters, so you can create a new hole or enlarge an existing opening without switching between several individual drill bits. High speed steel, often abbreviated as HSS, provides a balance of toughness, wear resistance and heat resistance for general-purpose drilling. Depending on the manufacturer’s specifications, HSS step drill bits may be suitable for aluminum, copper, brass and mild steel, while harder metals can require specialized cutting tools. For tasks such as adding cable pass-throughs to metal panels, modifying enclosures or sizing openings in thin plastic sheets, a step drill bit set can provide a practical range of drilling diameters. Clearly marked size increments help you identify the intended hole diameter, while a shank compatible with your drill’s chuck supports secure installation. Choosing high speed steel step drill bits starts with matching the bit’s diameter range, step length and material compatibility to your project. The length of each cutting step limits the material thickness that can be drilled at that diameter without the next step widening the opening, so check more than just the largest listed hole size. Straight-flute and spiral-flute designs provide paths for chip removal, and some HSS step bits feature titanium nitride or other coatings designed to reduce friction and improve wear resistance. A coating does not make a bit suitable for every material, so follow the product’s application and speed recommendations. For cleaner, more controlled drilling, clamp the workpiece securely, wear safety glasses and use an appropriate cutting lubricant where recommended. Larger cutting diameters generally call for lower drill speeds, and steady pressure helps the cutting edges remove material rather than rub against it. Stop at the desired step, clear chips safely and inspect the finished opening for burrs; a light touch with the next cutting step may help deburr an edge if the bit’s design allows it. Comparing these features makes it easier to select HSS step drill bits that suit your drill, your materials and the hole sizes you use most often.

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FAQ

HSS stands for high-speed steel, a category of tool steel used to make cutting tools. Its composition typically includes carbon and alloying elements such as chromium, tungsten, molybdenum, or vanadium. Some HSS grades also contain cobalt.

Common options include uncoated steel, black oxide finishes, and titanium nitride coatings. Black oxide is a surface treatment, while titanium nitride is an applied coating often associated with a gold appearance. Check the product specifications rather than relying on color alone to identify the finish.

Step drill bits commonly feature straight or spiral flutes. Straight flutes run lengthwise along the stepped body, while spiral flutes follow a helical path around it. The flute style is separate from the bit’s steel grade and surface finish.

Common shank styles include round, hex, and round shanks with machined flats. The shank is the portion held by the drill chuck or tool holder. Tool compatibility depends on the shank design and the connection requirements listed for the tool.

Store step drill bits in a dry case, drill-bit index, or tool organizer with individual compartments. Grouping them by steel grade, coating, or shank style makes identification straightforward. Keep labeled packaging or specification cards with the bits for future reference.