Our revolutionary adhesive bonding system secures tightly to most surfaces including drywall, painted block, brick, glass, tile, paneling and most other wall surfaces. And as one of the " original" removable adhesives, it removes cleanly with no residue, oily spots, or marring of walls... guaranteed. These wall savers get an " A." Teacher tested and preferred, this remarkable removable adhesive holds securely and removes cleanly up to 2 years. Removable Chart Mounting Tabs 1" x1" .