Description: [Durable Material]: Made of high quality hard metal, rust resistant, sturdy. [Easy to Work]: Very easy to use sawtooth hangers with screws. Just nail the hanger to the back of the frames and easily attached to the back of most wall hanging. [Wide Application]: Great for wooden frame, art panels, painted canvases, picture frame, wood signs, exhibition painting, DIY craft projects etc. [Seamless Wall Nails]: Each picture hanger comes with screws. Have very small nails, nailed to the wall will not damage the wall. Almost no trace of the outside, the wall is also very small damage. [Package includes]: 30 pieces small sawtooth hangers, 90 pieces screws,30 pieces triangle ring,1 piece screwdriver and also come with a holding case to keep them in. Specification: Material: Iron Size Chart: sawtooth hangers: 4.5cmx0.8cm/1.77inchx0.31inch Package Includes: 30 pieces small sawtooth hangers 90 pieces screws 30 pieces triangle ring 1 piece screwdriver 1 piece holding case(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.