Using this ASI 0031 toilet paper dispenser is easy. First, open the pin tumbler lock on the stainless - steel door. Place two standard toilet tissue rolls, each up to 5 - 1/4 inches in diameter, into the compartments. Leave one roll exposed for immediate use. When the exposed roll is used up, the other roll will automatically drop into place. To keep it in good condition, clean the satin - finished surfaces regularly with a soft, dry cloth to prevent fingerprints. Avoid using abrasive cleaners as they may damage the finish. If you need to access the rollers or change the rolls, use the key for the pin tumbler lock carefully. Also, make sure the rough opening in the wall for the recessed mounting matches the required dimensions of 6 - 1/4 inches wide, 12 - 1/4 inches high, and 3 - 3/8 inches deep.