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Step Drill Bits For Sheet Metal

Shop step drill bits for sheet metal to drill or enlarge holes to multiple diameters with a single bit. Compare hole-size ranges, step increments, and shank sizes to find an option that fits your drill and project, and check compatibility with the metal type and thickness you plan to work with.

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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. VEVOR - Drill Bit Set, 70 Pieces Drill and Driver Bit Set, Screwdriver Bit Set Suit Wood Metal Cement Drilling and Screw Driving - Black

    SKU: JJGHKKZ97P

    Product Description

    A versatile black drill and driver bit set with 70 high-strength pieces for wood, metal, and cement.
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    Your price for this item is $28.90

  3. Irwin - 33/64 X 6 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J7XJ86CL2R

    Product Description

    A high-speed steel drill bit with a straight shank, designed for heavy-duty metal drilling applications.
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    Your price for this item is $32.59

  4. Irwin - 37/64 X 6 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J7XJ86CL3C

    Product Description

    A high-speed steel drill bit with a 1/2" reduced shank for heavy-duty metal drilling applications.
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    Your price for this item is $35.28

  5. Irwin - Turbomax 7/16 X 5 1/2 L High Speed Steel Jobber Length Drill Bit 3 Flat Shank 1 pc

    SKU: J7XJ89QF8L

    Product Description

    A high-speed steel drill bit with black body, gold flute, and self-centering tip for fast, clean drilling.
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    Your price for this item is $18.75

  6. VEVOR - Drill Bit Set,101 Pieces Drill and Driver Bit Set, Screwdriver Bit Set Suit Wood Metal Cement Drilling and Screw Driving - Black

    SKU: JJGHKKZ9JY

    Product Description

    A versatile black drill and driver bit set with 101 high-strength pieces for wood, metal, and cement.
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    Your price for this item is $28.90

  7. VEVOR - Drill Bit Set, 246 Pieces Drill and Driver Bit Set, Screwdriver Bit Set Suit Wood Metal Cement Drilling, Screw Driving - Black

    SKU: JJGHKKZ9JC

    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 $46.90

  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. 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

  11. 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

  12. 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

  13. Amber Sporting Goods - Unibit 2 3/16-1/2"

    SKU: J78G5L2SHJ

    Product Description

    A high-speed steel step drill bit with a square shank for drilling thin metal, plastic, and laminates.
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    Your price for this item is $40.07

  14. Amber Sporting Goods - UNIBIT-3 1/4"-3/4" STEPDRILL

    SKU: J78G5L2SHL

    Product Description

    A high-speed steel step drill bit with a square shank for drilling multiple hole sizes efficiently.
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    Your price for this item is $56.07

  15. Irwin - Unibit 3/16 to 7/8 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank 1 pc

    SKU: J78G5L2SHQ

    Product Description

    A high-speed steel step drill bit with a square shank, ideal for smooth, self-starting drilling tasks.
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    Your price for this item is $63.30
    Save $0
    The previous price was $63.43

  16. Irwin - Unibit Assorted L High Speed Steel Step Drill Bit Set 3 pc

    SKU: J78G5L2W7V

    Product Description

    A three-piece high-speed steel step drill bit set designed for versatile, efficient hole drilling.
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    Your price for this item is $102.18
    Save $0
    The previous price was $102.31

  17. Irwin - 7/16 X 5 1/2 L High Speed Steel Drill Bit Round Shank 1 pc

    SKU: J78VXW45HQ

    Product Description

    A titanium nitride coated high-speed steel drill bit designed for extreme rigidity in metal drilling applications.
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    Your price for this item is $25.67

  18. Irwin - 13/32 X 5 1/4 L High Speed Steel Drill Bit Round Shank 1 pc

    SKU: J78VXW45HJ

    Product Description

    A titanium nitride coated high-speed steel drill bit designed for extreme rigidity in metal drilling applications.
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    Your price for this item is $24.51

  19. Irwin - 5/16 X 4 1/2 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J78VXWX5W2

    Product Description

    A titanium nitride coated high-speed steel drill bit designed for extreme rigidity in metal drilling applications.
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    Your price for this item is $21.83

  20. Irwin - 11/64 X 3 1/4 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J78VXWX5RS

    Product Description

    A titanium nitride coated high-speed steel drill bit designed for extreme rigidity in metal drilling applications.
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    Your price for this item is $19.15

  21. Irwin - 13/64 X 3 5/8 L High Speed Steel Drill Bit Straight Shank 1 pc

    SKU: J78VXWX5QP

    Product Description

    A titanium nitride coated high-speed steel drill bit designed for extreme rigidity in metal drilling applications.
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    Your price for this item is $19.78

  22. Irwin - 1/16 X 1 7/8 L High Speed Steel Drill Bit Set Straight Shank 2 pc

    SKU: J78VXWX5SW

    Product Description

    A set of titanium nitride coated high-speed steel drill bits with a heavy-duty web design for metal.
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    Your price for this item is $20.51

  23. Irwin - 1/2 in. X 6 in. L High Speed Steel Drill Bit Round Shank 1 pc

    SKU: J78VXW45W9

    Product Description

    A high-speed steel drill bit with titanium nitride coating for durability and a 135-degree split-point tip.
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    Your price for this item is $29.18
    Save $0
    The previous price was $29.31

  24. Irwin - 7/64 X 2 5/8 L High Speed Steel Drill Bit Set Straight Shank 2 pc

    SKU: J78VXWX59V

    Product Description

    A set of titanium nitride coated high-speed steel drill bits with a heavy-duty web design for metal drilling.
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    Your price for this item is $20.51
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Step drill bits for sheet metal make it easier to create clean, round holes in thin metal without switching between multiple drill bit sizes. Their cone-shaped, stepped design combines several cutting diameters on a single bit, allowing you to start a hole and gradually enlarge it to the size your project requires. This versatility makes a step drill bit a practical choice for drilling electrical enclosures, metal panels, ductwork, and other thin-sheet components. For the best results, match the bit’s material and cutting geometry to the metal you plan to drill. High-speed steel step drill bits are commonly used for aluminum and mild steel, while cobalt-alloy options can offer greater heat resistance for tougher materials, including stainless steel, if the manufacturer specifies compatibility. Titanium nitride coatings can help reduce friction and wear, but a coating alone does not determine which metals a bit can handle. Compare the available hole diameters, shank size, and maximum material thickness before choosing a step drill bit set, and check whether your project calls for fractional-inch or metric sizes. Achieving accurate holes with step drill bits for sheet metal depends on secure workholding, controlled speed, and steady pressure. Clamp the sheet metal firmly to a stable work surface, leave clearance beneath the drilling location, and wear eye protection to guard against sharp metal chips. A center punch can help keep the tip from wandering on smooth surfaces; some step bits are designed to start without a pilot hole, while others may require one according to the manufacturer’s instructions. Use the recommended drilling speed for your bit and material, generally reducing speed as the cutting diameter increases, and apply a suitable cutting lubricant where recommended to manage heat. Stop at the intended step rather than forcing the bit deeper, since each successive cutting edge enlarges the opening. Material thickness matters, too: the sheet must fit within the usable cutting depth of the selected step to produce a consistent hole diameter. After drilling, inspect both sides and remove any remaining burrs with an appropriate deburring tool. With the right size range and technique, sheet metal step drill bits can simplify hole enlargement and help produce smooth, accurately sized openings for fasteners, fittings, and cable-routing hardware.

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FAQ

Step drill bits are commonly made from high-speed steel (HSS). Some use cobalt-alloy high-speed steel, while specialty versions may incorporate carbide. The base material is separate from any coating applied to the bit.

Common surface treatments include titanium nitride (TiN) and black oxide. Some step drill bits have an uncoated, polished finish. Check the listed specifications to identify the coating, since color alone does not reliably indicate its composition.

Straight-flute step drill bits have grooves that run lengthwise along the cutting body. Spiral-flute versions have grooves that curve around it. These terms describe the arrangement of the channels alongside the cutting edges.

Common shank styles include round, hexagonal, and three-flat designs. The shank is the portion held by the drill chuck or tool holder. Its shape is distinct from the stepped cutting body.

Follow the manufacturer's care instructions to remove metal residue and cutting fluid. Routine care generally includes cleaning with a soft brush or cloth and drying the bit before storage. Apply a light coating of tool oil if recommended for the bit's material and finish.