Command� Medium Picture Hanging Strips hold up to 5.4kg per 4 sets for frames sized 45cm x 60cm. Ideal for black or dark coloured fr ames. Command� Picture Hanging Strips make decorating quick and easy. No nail holes or sticky residue. They feature Interlocking Fas tener technology and lock your pictures in place. When you aree ready to take down or move your pictures, they come off cleanly with out damaging walls. Follow all back of pack instructions.