Review on 🚀 Maximizing Performance: Combination Tapping Metric Thread Coating Unleashed by Rod Evans

I only ordered a set of 6 so I can't confirm what others have received but 3 of the 6 I received had serious sizing errors from the manufacturer on the drill bits. I have attached 2 photos of some manufacturer faults. The first photo shows the "unintentional" ground planes (both sides) on the leading edge (cutting edge) that DESTROY the bit's ability to drill holes. These flat points should NOT be there. In the second photo you can see that this side of the "back angle of the terrain" is not a negative angle (like ALL the drills on the ground). Hole. Every locksmith in the world knows this mistake from the first days of learning how to sharpen bits. Others had "asymmetric" (off-center) sharpened tips. This means that one half of the blade is longer than the opposite side. This causes a portion of the drill bit to over-drill holes and leads to premature wear of the drill bit.