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The best step drill bits you can buy

AI-generated summary · updated August 29, 2026 · verify details before purchase.

  1. IRWIN Unibit Step Drill Bit, 3/16-Inch to 1/2-Inch, 1/4-Inch Shank (10223)
    Best overall IRWIN

    IRWIN Unibit Step Drill Bit, 3/16-Inch to 1/2-Inch, 1/4-Inch Shank (10223)

    4.7/5 $19.10 Only 1 left

    High-quality coated M2 steel, precise steps, durable for thin materials like metal and plastic.

    • Sharp cutting edges
    • Smooth burr-free holes
    • Long-lasting coating
    • Not ideal for thick steel
  2. DEWALT Step Drill Bit Set, 3-Piece (DW1361)
    Best value set DEWALT

    DEWALT Step Drill Bit Set, 3-Piece (DW1361)

    4.6/5 $62.00 Only 5 left

    Three sizes cover 1/8 to 1/2 inch, titanium nitride coating, indexed for easy step identification.

    • Versatile size range
    • Reduced walking with pilot tip
    • Rugged storage case
    • Some users report chipping over time
  3. Makita Step Drill Bit, 1/4-Inch Shank, 5-Piece Set (D-78505)
    Best for professionals Makita

    Makita Step Drill Bit, 1/4-Inch Shank, 5-Piece Set (D-78505)

    4.5/5 $21.65

    Cobalt M35 steel, heat-treated for extreme durability, works well on stainless steel.

    • Excellent heat resistance
    • Cuts through stainless steel
    • Precise step increments
    • Higher price point
  4. Milwaukee Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 7/8-Inch (48-89-8005)
    Best for metal panels Milwaukee

    Milwaukee Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 7/8-Inch (48-89-8005)

    4.6/5 $33.99

    3-flute design for faster cutting, split point tip prevents walking, ideal for automotive and HVAC.

    • Fast chip removal
    • Anti-walking tip
    • Fits standard drill chucks
    • Limited to thin materials
  5. BOSCH Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 1/2-Inch (1902-1B)
    Best budget pick Bosch

    BOSCH Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 1/2-Inch (1902-1B)

    4.4/5 $49.49 Only 15 left

    Affordable yet durable M2 HSS bit, double-flute design reduces vibration, good for DIY projects.

    • Low price
    • Smooth cutting action
    • Easy to sharpen
    • Coating wears faster
    • Not for heavy use
  6. Neiko 10193A Titanium Step Drill Bit Set, 3-Piece
    Best entry-level NEIKO

    Neiko 10193A Titanium Step Drill Bit Set, 3-Piece

    4.3/5 $12.99

    Budget-friendly set with titanium coating, covers 1/8 to 1/2 inch, good for occasional use.

    • Very affordable
    • Good for soft metals and wood
    • Compact storage
    • Less durable
    • May overheat on thick material
  7. Klein Tools Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 7/8-Inch (32625)
    Best for electrical work KLEIN TOOLS

    Klein Tools Step Drill Bit, 1/4-Inch Shank, 3/16-Inch to 7/8-Inch (32625)

    4.5/5 $29.99

    Designed for metal conduit and boxes, single flute for clean holes, sharpens easily.

    • Clean holes in electrical boxes
    • Non-slip shank
    • Laser-etched markings
    • Single flute slower on thick material
  8. WEN 5-Piece Titanium Step Drill Bit Set (WA1165)
    Best variety pack COMOWARE

    WEN 5-Piece Titanium Step Drill Bit Set (WA1165)

    4.2/5 $23.99

    Five sizes from 1/8 to 3/4 inch, titanium coating, index case, decent for home workshops.

    • Large size range
    • Comes in case
    • Good value per bit
    • Coating chips off with heavy use
    • Not for professional daily use

Buying advice

When choosing step drill bits, consider the material you'll cut most often. For thin metals (up to 1/8 inch), standard HSS with titanium coating works fine. For thicker or harder metals like stainless, choose cobalt bits. Look for split-point tips to prevent walking and a 3-flute design for faster cutting. A set offers versatility, but a single high-quality bit may be better if you need only one size range.

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