Wrenches should not be hammered or struck. Do not use extensions on handles for additional leverage. Side cutting pliers Electricians' pliers should be insulated and the insulated grips should be replaced as needed. The use of safety glasses with side shields will help prevent eye injuries. Jaw serrations should be sharp enough to hold wires securely.
Screwdrivers Keep tips clean and square-edged.
It is acceptable to reshape minor wear with a file. The tip should fit snugly in the screw. Dispose of any screwdriver with a broken or loose handle, bent blade, or dull or twisted tip. Never use any screwdriver for electrical work unless it is insulated. Be alert for small cracks in the insulation.