3 Pieces Multiple Hole Stepped up / Hole Opener

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Description:

Titanium coating reduces friction and heat.
High-speed steel pedal drilling is of higher quality and durable than ordinary twisted drilling.
These are perfect for creating smooth, clean and round holes. Suitable for perforated metal, iron, aluminum, brass, wood, , etc.
This drill set includes 3 sizes (3-12mm, 4-12mm, 4-20mm) to meet your different needs.
Black is treatment, but a nitriding treatment to increase hardness and wear resistance.

Size Chart:

3-12mm Total Length: 65mm/2.56inch
4-12mm Total Length: 73mm/2.87inch
4-20mm Total Length: 77mm/3.03inch

Package Includes:

3 Pieces Step Drill Bit Set

Note:

Please allow 1-3mm measuring deviation due to manual measurement.
Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!

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