The tip must be kept clean and sharp to permit a good grip on the head of the screw. The part being worked should never be held in the hand. It should be laid on a bench or flat surface, or held in a vise. Screwdrivers having blades or rivets extending through the handle should never be used for electrical work. Both blade and handle should be insulated except the tip.
Knives are more frequently the source of disabling injuries than any other hand tool.
The principal hazard in the use of knives is the hand slipping from the handle onto the blade. Never carry a sheathed knife on the front part of a belt. Always carry it over the right or left hip, toward the back. Let it drop to the ground, and then pick it up by the handle. To use an axe safely, workers must be taught to lift it properly, to swing correctly, and to place the stroke accurately.