Command interlocking picture hanging strips make decorating quick and easy. One click tells you 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 leaving no wall damage, cracked plaster or sticky residue. Command interlocking picture hanging strips come in 3 sizes: Smallstrips hold most 8 x 10 frames, medium strips hold most 18 x 24 frames and large strips hold most 24 x 36 frames.