Using this Bobrick toilet tissue dispenser is easy. First, make sure you have the right rough wall opening in your washroom as specified (12 - 1/2″ W x 7 - 3/8″ H x 4″ min. depth). Then, mount the dispenser securely on the wall. To load the toilet tissue, open the dispenser using the provided key. Place two standard - core toilet tissue rolls, each up to 5 - 1/8″ in diameter, inside. Close the dispenser and lock it. Remember to use only standard double rolls for the best fit. For maintenance, wipe the dispenser with a soft, damp cloth regularly to keep the matte black finish looking good. If you encounter any issues with the lock or the mechanism, contact Bobrick customer service.