Review on 🔩 Industrial Drill Bits: High-Performance 8 Inch Cobalt Aircraft Extension Drilling Cutting Tools by Matthew Aiono

I received five 6 inch bits but as you can see in the picture they were all used. I found the picture when I opened the package. I could hardly believe it. Take a closer look, the one with the drywall is clearly not cobalt, just regular high-speed steel, easily distinguishable by its surface. I bought the same set of bits a few months later. back and got five new cobalt bits that I am completely satisfied with. Don't know what to do with this batch but I didn't order the various used bits so I will be returning them.