Using these Klein insulated screwdrivers is simple. First, pick the right tip (1/4 - Inch Cabinet - Tip or #2 Phillips - Tip) for your job. Hold the screwdriver by the cushion - grip handle for a comfortable and firm hold. When working near energized sources, always double - check that the voltage is within the 1000 - volt limit marked on the tool. Make sure to keep the screwdrivers dry at all times. Avoid using them in wet or damp conditions as it can compromise the insulation. After each use, wipe the screwdrivers clean with a dry cloth. Store them in a cool, dry place, away from sharp objects that could damage the insulation. If you notice any damage to the insulation, such as cracks or cuts, stop using the tool immediately and replace it. This will help ensure your safety and keep the screwdrivers in good working condition for a long time.