Using this Klein Tools screwdriver is easy. Just select the right size for your task and insert the tip into the screw head. You can use a wrench on the square shank for extra turning power when needed. When using it, make sure the tip fits well in the screw head to avoid slipping and damaging the screw or the tool. As for maintenance, keep it clean after each use. Wipe off any dirt or debris. You can also apply a light coat of oil to the chrome-plated parts to maintain the smooth feel and prevent corrosion. Store it in a dry place to avoid rusting. This screwdriver is designed for heavy use, but don't use it for tasks it's not meant for to ensure its long - lasting performance.