Description
3 drills for different graduations with polished surface from 3 to 14 mm, 5 to 20 mm and 16 to 30mm. you can achieve one-time processing of large holes, no need to replace the drill bit and positioning hole.
Made of high speed steel, with high hardness, bending resistance, fracture resistance, and long service life.
Use of drilling holes in a variety of materials such as steel cutting, brass, wood, etc.
Mark hole locations and Two-fluted design makes drilling faster and smoother. Surface depth gauges make drilling precise.
The sheet metal bit is best used with a drop of cutting oil to achieve a clean perforation of the sheet metal.
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