Command, 12 pack, medium, black picture hanging strips, no more nail holes, cracked plaster or sticky residue, make decorating quick & easy, 1 click tells you picture hanging strips are locked in & 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, hold most 18″ x 24″ frames, value pack contains 12 sets.