Uxcell A14082700Ux0306 Spiral Tungsten Carbide – High-performance Cutting Tool for Precision Machining Review

These are good parts, of course. They are MUCH better than what you get when you order a cheap little hand drill and are pretty durable. So far I've hit 4 out of 10 but I can't say it's because of the drills. They're fast and sharp, but after drilling 40+ small holes in your first PCB, you begin to understand why so many people only pay for things from the factory.

You'll break them. Calibrate the press and chuck to the perfect right angle and you'll still break them. My trick is to get rid of the break and use the last 1/4 of the drill to drill a few hundred holes before the rest of the drill gets stuck in the PCB and has to be drilled with another drill, which inevitably breaks. They come in a pack of 10 for a reason.

**2 star rating explained by asterisks. The beats work great. They cut through copper plates like butter. They are very small and therefore break easily. This is not a problem if you use them properly. Just use them in a drill press, let the bit do its job, and do it very slowly, and a bit will last a very long time. You are about to disconnect. It's just going to happen. For example, you will move something on your workbench and accidentally hit the drill. You'll find that you actually hit the