Are the drill bits different colors? What's the difference between them? How to choose？ - AGrade Carbide
In mechanical processing, hole processing accounts for about 1/5 of its total processing, and drilling accounts for about 30% of the entire hole processing. I believe that the gold powders working in the drilling line will not be unfamiliar with the understanding of drill bits. When purchasing drill bits, there will be drill bits of...
Tim
