Proper blade for specific screw.
Holding screwdriver properly.
(b) Precautions. Handle the screwdriver carefully. Use the right sized
screwdriver for the job. Keep the blade clean. Do not carry a screwdriver in your
pocket unless it has a pocket clip. Never use a screwdriver for prying or
chiseling operations. When difficulty is encountered in driving or removing screws
that are hard to turn, do not use pliers to turn the screwdriver. Pliers will
damage the screwdriver. For hard to turn screws, select a square bladed
screwdriver designed for heavy duty, and a wrench which properly fits the blade.
After use, wipe the screwdriver with light oil and place
in a rack or toolbox.