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M35 Cobalt Pro Heat Treated Step Drill Bit

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Product Description


Drilling through all types of materials will never be the same with an M35 Cobalt Pro heat-treated step drill bit. If you have had the experience of drilling using cobalt drill bit, you would know what we are talking about. But if you have not, you are in for an eye-opening surprise.

Step drills are typically used to puncture holes on thinner materials like sheet metal. The conical shape is for drilling small then gradually larger holes.

Unlike conventional drill bits that create holes in a single size from the periphery all the way through the material, a step drill bit can make larger holes without the risk of damaging the surface.

If that already changes your mind about your drill bit preferences, you should also know more about the compounds and treatment process these tools undergo.


This M35 cobalt step drill bit, for example, is classified better than drill bits that are made with other combinations.  Tungsten, molybdenum, and chromium have their strengths but not equal to cobalt.  Cobalt drill bits have higher heat resistance and Rockwell hardness.  This means they are more durable and last longer than other types. They are best used at relatively low speed with lubricants.

Moreover, it can drill into hardened steel without a problem. You can even do this all day long and you won’t notice a change in its sharpness and precision. Considering that these bits can create holes in varying sizes, they are a more practical choice of tool to have in your workshop.

If you are set to do some metalworking projects, it would do you well to have a number of these bits at your disposal. It can do what conventional drill bits cannot.  You can be confident that you get great results with the money you pay for. 






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4-12mm, 4-22mm, 5-35mm