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High-Speed Steel Thread Spiral Screw

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High speed steel (HSS) bits are threaded for metric thread tapping of soft metal, wood, plastic, aluminum, and iron. They are multi-coated to remain bright and sharp.


🔩 A comprehensive set
This is a very comprehensive set of screws. With this complete set, no need to buy any other products to perform the same job. The sizes are just right and they’re quality, so they always work. Because they work every time, I can just get on with the job, without worrying.

- L D Knarr, Butte City, CA

👍 Work really well 
I think anyone who does a lot of building or construction work should seriously consider getting some of these. They work really well, especially since they’re made from high speed steel, which really is the way to go these days. They’re strong and reliable, and that’s what you want.

- M Wilson, Philadelphia, PA

💪 Strong enough for any material
I’ve been using these spiral screws for some time now and I’m happy with the results that I get. They’re strong enough to use with pretty much any material, they work first time which helps me get the jobs done on time. I would recommended these screws for sure.

- Lori S Riddles, Englewood, CO


3 Reasons You Should Order This Product:

🔩💪 Quality

The spiral screws are constructed with high-quality High-speed steel, which is guaranteed to perform and to last for a long-time.

🔨✔️ Efficiency

You can get the job done quicker with these screws, because of the strength of the material and the quality of their design.

🛠⚙ Versatility

The quality of the spiral screws allows them to be used with many different construction materials, including soft metal, wood, plastic, aluminium and iron.



Materials: High-speed steel (HSS)
Shank diameter: ¼ inch (6.35 mm) hex

Size & quantity:

  • 1 x M3 x 0.5 (6-32NC) total length: 55 mm; Spiral length: 24 mm; drill diameter: 2.5 mm
  • 1 pcs M4 x 0.7 (8-32NC) total length: 54 mm; Spiral length: 24 mm; drill diameter: 3.3 mm
  • 1 pcs M5 x 0.8 (10-32NC) total length: 58 mm; Spiral length: 28 mm; drill diameter: 4.2 mm
  • 1 pcs M6 x 1.0 (10-24NC) total length: 58 mm; Spiral length: 28 mm; drill diameter: 5.0 mm
  • 1 pcs M8 x 1.25 (12-24NC) total length: 59 mm; Spiral length: 18 mm; drill diameter: 6.8 mm
  • 1 pcs M10 x 1.5 (1 / 4-20NC) total length: 59 mm; Spiral length: 20 mm; drill diameter: 8.5 mm

Package Includes:

  • 1 x 6-piece set of composite drill and tap bits.