Review on Titanium Step Drill Bit by COMOWARE by Nicole Mcleod

I liked the option to compactly fit so many drills. What do we have... A set for 500 rubles of three conical sandy loam drills 4-32.4-20.4-12, with a step of 2 mm. I've tried everything and this is what I can say. In the store opposite, you can buy a set of drills for this money and throw it away immediately without drilling a single hole ... and this Chinese miracle works quite tolerably. I drilled 4mm aluminum, 1.5mm steel plates and thin sheet material such as tin and stainless steel, the drills remained in perfect order. They've already made several holes. There is an interesting point in them, having drilled a hole of the diameter you need, you can immediately make a sweat. It is convenient to drill plastic parts. However, it is worth noting that you don’t need to rely heavily on a miracle, all drills get blunt anyway, so according to all the rules ... Do not overheat. A drop of oil and go) The larger the diameter of the hole, the more steps are involved, and they all become dull, especially the first small one. As a result, you can take it. Compact and cheaper than the market. The Chinese delivered in a week.