High Quality:- Made of durable metal with copper/zinc/nickel, rustproof, anti rotation, durable and long service life. Reusable and easy to install:- Simply to set the picture hooks on the wall with nails, the invisible appearance makes it easy to remove and reuse. When removed, there are no marks on the walls or frames except for a small dot. Box Contents: 30 LB 30pcs + 1.4*25mm screws 30pcs + 50 LB 20pcs + 2*38mm screws 20pcs total 50 sets Color: gold Great organization:- Hang paints include small screws (no general nails), not only keep all hooks well organized, photos also portable and reusable. Wide Usage:- Suitable for hanging heavy mirrors, photos, pictures, paintings, canvas , publications, wall clocks, etc.