Using this toilet paper dispenser is easy. First, open the dispenser using the key if it's locked. Then, place a toilet paper roll with a diameter of up to 5-1/2 inches inside. Close the dispenser and lock it if you want to prevent unauthorized access. To maintain it, clean the bright - polished stainless steel surface regularly with a mild cleaner. Avoid using abrasive materials that could scratch the finish. If there are any issues with the locking mechanism, contact the manufacturer for assistance.