- Interlocking system with one clip fitting snugly into another to provide secure fastening and make you safe from falling objects. - Practical design with countersunk and symmetrical screw holes to allow for quick installation with minimal effort. - galvanized iron material with maximum corrosion resistance to ensure extended use for years to come. - Bring elegance to your home and office with securely mounted art works, exhibition paintings, posters and more. Material: Iron Finish: Zinc plated Total Size: 53mm x 30mm x 6mm / 2.09" x 1.18" x 0.24" (L*W*H) Thickness: 2mm / 0.08" Mounting Hole Diameter: 4mm / 0.16" Package Content: 10 x Picture Frame Hooks