1Suitable for workpieces with a hardness of 25HRC or less, such as iron plates, aluminum plates, PV plates, insulating plates, etc. 2A drill can drill a variety size of holes to meet your different needs. 3It is possible to deburr, chamfer, and open-hole reaming that twisted drills cannot be completed. 4Compared with the ordinary twisted drill, the sway is small, and the aperture can be opened without using the center punch. 5The drills are made of high speed steel which is durable and has long service life.
