Using your Bobrick B - 2890 toilet paper dispenser is easy. First, unlock the dispenser using the key that matches your other washroom accessories. Open the unit and place your toilet paper roll on the spindle. If you have a 2 - 1/8' (55mm) diameter core roll, add the two rubber o - rings to the inner spindle provided by the manufacturer before placing the roll. For 3' (75mm) diameter core rolls, use the convertible feature of the spindle. Close the dispenser and lock it up. When it comes to maintenance, simply wipe the satin - finish stainless steel surface with a soft cloth regularly to keep it looking clean and shiny. Avoid using abrasive cleaners as they may damage the finish. If you have any issues with the lock or the spindle, contact the manufacturer for support.