These 1-5/8"L sawtooth hangers work best on smaller picture frames that are meant to hang on a nail or similar small wall projection. They are sturdy aluminum, won't rust and attach to any wood frame. Just center the hanger on the top rail of your frame and attach it with the nails that are included. Once installed it is easy to hang and level any picture. This offer is for a lot of 144 brand new sawtooth hangers with nails. For hundreds more craft, art and hobby products be sure to visit our Amazon Storefront. We have the creative component you need.