Step Drill and Countersink

The solid carbide step drill and countersink drill can complete drilling and countersink in one step.

  • Metric and inch
  • Flute type: straight, helix
  • Number of flutes: single, double, three, four and multiple
  • Material: carbide
  • Diameter: 0.15 ~ 25mm
  • Coating: PVD, CVD
  • Shank: h3\h4\h5\h6, suitable for shrink fit
  • Custom order:
    • 1-300 pieces: 10 days
    • >300 pieces: 15 days
  • Packaging, shipping and delivery: Please contact for a quote
  • Supply: Wholesale or factory OEM


Solid carbide step and countersink drills can machine much faster than combination tools, and the hole sizes are more stable. Thanks to state-of-the-art NC grinding technology, our solid carbide countersinks can be designed and manufactured to desirable geometry to continuously control tolerance and cutting efficiency. With our CVD diamond coating, our countersink drills have extra-long tool life.

The following are regular sizes for reference. Please get in touch with us for more custom information:


Metric: mm



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  • To receive a correct replacement or full credit, kindly inform us within 14 days of receipt, in case the item you received is faulty. In the case of returned goods that are not defective, there will be a 20% return handling fee deducted from the original purchase price. Please ensure that the returned goods reach us within 14 days of the original purchase date, otherwise no credit will be issued. Contact us for more details in Return and Refund policies. If you decide to return and apply for refund, please download and fill in the Return Form, and attached the file to:

We use DHL global serive to deliver packages efficiently. Here is the Shipping Instruction and Shipping Rate at which you can simply estimate the shipping cost, or contact us for up-to-date calculation.