Review on DEWALT 21 Pack Black Oxide Twist by Denise Davis

Greetings to all! Today I want to share with you my impressions of the "one-on-one" use of a set of metal drills from DeWalt. The kit includes 6 drills with diameters of 2.3, 4.5, 6 and 8 mm. However, the drills differ from each other not only diameters. The drills are made of high speed steel with the addition of cobalt. First, I was pleased with the quality. Despite the fact that I use a set "on occasion", drills with a diameter of 2mm have about 80 holes, 3mm - more than 300.4mm - about 100.5mm - about 60.6 and 8 - about 30 holes each. And, nevertheless, the "dead" now is only a troika, and then only temporarily (I will re-sharpen, but all hands will not reach in any way). All others are in very good condition. Drills 2.3 and 4mm have the most common cylindrical shank, like the vast majority of drills for drills. But the rest have three ... I don’t even know what to call them ... In general, they are necessary in order to reduce the likelihood of turning the drill. If you look closely, you can see that the tail is more triangular than cylindrical. Although from this angle, I think this one (I don’t know what to call it) can be seen better. All drills use a double helix for chip removal. But that’s not all. Drills with a diameter of 5.6 and 8 mm have a two-stage sharpening. That is, you don’t need to drill 2mm first, then drill from 2 to 4, and then from 4 to 6. You can take 6 right away. The first part will be 4mm, and the second step will be 6mm. But that’s not all. Sharpening is done in such a way that a very small "contact patch" is provided, when you apply the drill just before drilling. As a result, the drill does not lead away at the start. This is a very serious plus. For example, at Makita, the sharpening was done a little differently and, so that the drill did not lead away, it was necessary to glue molar tape or core. There is no need to do either of these. In terms of drilling speed, I was very pleased with the drills, they literally bite into the metal even when drilling at a speed of 600 rpm. I also repeatedly drilled wood with them, the result is also amazing both in speed and in the evenness of the holes. These are by far the best drills I have ever used. Put your fingers if this information was useful to you, add as a friend to keep abreast of new reviews.