About this item These wood shelving UPC label holders clip on to shelves that measure 3/4 of an inch thick. Features a strong, non-marring PVC grip that will help keep your labels on your shelf without marking them. This item also features a dedicated slot that will keep your tickets or labels in place. These wood shelving super grips can be used facing up or down on the C-Channel of your shelf. Perfect for libraries, schools, stores & other places with wooden shelves that need to be labeled. Please note, this listing is for 20 Label holders ONLY – No labels are included in this order.