6: To use a pin vise, hold it vertically between your thumb and
fingers. Your “index” finger can rest on top of the pin vise to
keep it vertical. With small drill bits and materials such as
wood, styrene, and resin castings, the weight of the pin vise
will generally be enough downward pressure. Otherwise, you
can apply just a very light downward pressure with your index
finger. Twist the pin vise with your thumb and fingers while
holding the work piece with your opposite hand. Too much
downward pressure will result in broken drill bits when using
those smaller than a No. 77 or so.
6
