Good value but nowhere as good as carbide drills.
I brought these drill bits to drill PCB's with my Drill stand but even at high speed they did not produce a good finish on low-cost paper based PCB's. They barely managed to cut Epoxy PCB's. This being said, it is recommended to use carbide drills for this purpose and I found these drills great for precision work with softer materials such as wood. Very handy addition to ones toolbox although I would not recommend using these to drill PCB's.
