Review on Enhanced Performance with Drill America Cobalt Economy Degrees: Unleash Your Drilling Capabilities by Tony York

Ordered 1/32" drill bit for my partner who is a novice jeweler. You should substitute a Dremel brand drill bit of the same diameter. even silver is not very good. I thought I'd buy something cheaper while she was learning the instrument, but these seem cheap in the wrong sense of the word, not just cheap. I just replaced them for about $3. /ea cobalt bits are from McMaster and they are great. They cut silver like butter. So you get what you pay for.