Manufactured by Consolidated Drill in the U.S.,
these drills will cut "Grade 8" bolts, stainless
steel, even spring steel far longer than other
premium bits before getting dull or breaking.
You can't mix them up with your other drill bits
because they are bright gold,
THEY STICK OUT LIKE A SORE THUMB!
Better than regular cobalt or titanium, because
they are not brittle, they just don't break like 
other bits.