One click tells you the Command™ Picture Hanging Strips are locked in and holding tight. Best of all, when you are ready to take down or move your pictures, they come off cleanly— no nail holes, cracked plaster or sticky residue. Command™ Picture Hanging Strips come in three sizes: Small strips hold most 8 inch by 10 inch frames, medium strips hold most 18 inch by 24 inch frames and large strips hold most 24 inch by 36 inch frames. Also available are Command™ Frame Stabilizer Strips which keep picture frames level even if hung by nails.