Small and medium picture hanging strips for framed photos and artwork. They hold strongly and remove cleanly using 3M stretch-release technology. Strips stretch off cleanly without leaving holes, marks or sticky residue. 4 sets of small strips can hold one frame weighing up to 1.8 kg and measuring up to 20 by 25cm. 4 pairs of medium strips can hold one frame weighing up to 5.4 kg and measuring up to 45 by 60cm. Suitable for most smooth surfaces including painted walls, tiles, metal and wood. Do not use on wallpapers, vinyl surfaces, or other delicate or weak surfaces. Not suitable for humid environments.