Review on Uxcell A14082700Ux0306 Spiral Tungsten Carbide – High-performance Cutting Tool for Precision Machining by George Bell

**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 cartridge and accidentally broke the bat. They are fragile and tiny. Take a deep breath, replace the tip and order a new one when you have the last 3 left. ** The reason I gave these tips 2 stars is because 3 tips arrived broken before you opened the package. If those bits are already breaking for no reason, every bit counts. When it comes to these bits, 7 bits is MUCH less than 10. Not only did the bits break, so did the case. The reason I like to order these bits is because they come in a case. They don't rest on the case back, but float in the middle. In the picture on the left you can see the 0.8mm box I ordered earlier. He came whole, bits and a box. You can see three pins sticking out of the clam shell and going into the body of the chisel. The clamshell on the right is missing 2 pins, which must have caused the bit to break during transport. I don't mind breaking bits due to my own mistakes. What I don't like are broken products. If you decide to order these bits, be aware that you may end up with a few broken pieces.