Hello HomeDepotCustomer and thank you for your feedback on the Home Depot website for your Moen 30 in. Replacement Towel Bar in Chrome. The towel bar is designed to roll in the mounting posts. Should you require any warranty or pre-purchase assistance, please feel free to call us at 800-289-6636. Our business hours are 9:00 a.m.-5:30 p.m. Eastern Time Monday through Friday.