Using these Klein 32400 replacement bits is a breeze. First, make sure your Klein Extended - Reach (32559) Multi - Bit Screwdriver/Nut Driver is clean and in good condition. Then, simply insert the appropriate #1 or #2 Phillips bit into the tool. When working, apply steady pressure to ensure the bit stays firmly in the fastener. As for maintenance, after each use, wipe the bits with a clean cloth to remove any dirt or debris. Store them in a dry place to prevent rusting. Be careful not to force the bit if it doesn't fit properly, as this could damage the bit or the fastener.