Using this screwdriver set is easy. First, open the carry case and pick the right screwdriver bit for your job. If you're working on a project that requires Phillips head screws, choose one of the Phillips bits like Phillips 0, 1, or 2. For flat - head screws, go for the 2.5mm or 3mm flat bit. When using the screwdrivers, make sure the bit fits well into the screw head to avoid slipping and damaging the screw or the surface. Since these screwdrivers are rated for 1000V, they're safe for electrical work, but always double - check the voltage of your work area. After use, clean the screwdrivers with a dry cloth to remove any dirt or debris. Store them back in the carry case to keep them organized and protected. Remember, the set comes with a 3 - month warranty, so if you have any issues, contact our customer service.