Protect Furniture and Other Surfaces With the self-adhesive layer on the back of these protective cork disks, you can stick them to any surface to prevent scratches, before its too late, including wood and glass. Quick and Easy to Use Simply peel off one of these self-stick furniture protectors and place firmly and securely onto the rough or sharp surface of the item. It may be necessary to place more than one disc on the product in order to prevent it from scratching furniture or another surface, such as glass. The natural cork provides a strong and protective buffer, Assorted Sizes Our package of self-adhesive cork protective discs includes 20 furniture and surface protectors in 3 different sizes: 2 discs measuring 1. 5 in diameter, 8 discs measuring 0. 75 in diameter, and 10 discs measuring 0. 5 in diameter, Multi-Use Protect glass tables and shelves, desks, furniture, painted bookcases and cabinets from appliances, lamps, vases and decorative pieces, tableware and metal trivets.