convex glass lens with a 10cm diameter and 300mm focal

Material: Brass, stainless steel, and metal; picture hangers, universal frame hangers. Versatile use: Various sizes and designs of picture hooks meet your needs for hanging picture frames, cross-stitch work, artwork, framed maps, framed postcards, paintings in home, office, school, etc. Wall hooks for picture frames, frame hooks. Packaging: Practical and reusable plastic box for easy storage; small sets can be neatly stored. Picture hangers, wall frame hangers. The set contains 9 different picture hangers (4 of each) as well as 60 additional screws (96 pieces total), including hanging hardware and hooks for picture frames. Note: Contains small screws. Please keep away from children and prevent swallowing. Suitable for picture frame hangers and picture hooks.