One click tells you that the Command™ Picture Hanging Strips are locked in and holding tight, and when you are ready to take down or move your pictures, they come off without damaging your walls with nail holes, cracked plaster or sticky residue. Command™ Picture Hanging Strips are also great for creating a gallery wall, hanging college dorm decor, nursery décor, acoustic foam boards, and more. When you're ready to redecorate your space, the Command™ Picture Hanging Strips remove cleanly and damage free.