Review on Titanium Step Drill Bit by COMOWARE by Denise Davis

The specified device was purchased by me in March of this year in a popular online store. Priced at just over $500. The range of holes is from 6.25mm to 34.75mm, that is, as many as ten drills in one, namely 14 inches, 3/8.1/2, and so on up to 1.38 (34.75 mm) Someone may have a question - why inch sizes if there are the same with an ordinary size of 4 mm. up to 32, for example, ... I answer that cable glands that have recently appeared on sale have precisely "inch" dimensions. Of course, in the opinion of a simple layman, this "primo” is not necessary for everyone, those who are faced with electrical installation work, work related to the installation of light metal structures will certainly appreciate and purchase this device. There is another plus of this model - the shank has a trihedral shape, which allows you to securely fix the "herringbone" in the drill chuck or screwdriver. I will note one more important point, it is necessary to drill at low speeds, if possible, using the cooling of the cutting tool, that is, to prevent overheating of the cutting edge of the drill.