Package Contents: you will receive 50 picture hooks and 50 screws in the set, enough quantity to meet your daily needs Material: picture frame hooks are made of metal material, strong and durable, light in weight, sturdy and not easy to bend, and can be used for a long time Size: d rings picture hanging is approx. 10 x 21mm, small size can help hide behind the frame. and screw is approx. 10 x 3mm, can making you carefully remove the picture hangers with few trace or damage to the wall (screws are small parts so, please keep away from children) Easy To Install: put the screws into the grooves of the picture holder. just use phillips head screws on the back of the wood. the screws are small, but easy to install. (please pay attention to safety during installation to avoid hand injury) Wide Application: picture hanging kit is ideal for artwork, photos, clocks, mirrors, pinboards, paintings, nail-free hanging pictures, canvas holders, and more for your home, office, or exhibit, Weight: 0.1763698096 Pounds, Manufacturer: CYIOU