Material: hard metal, durable stamped metal and rust resistant; Color: black,Length: 39 mm, width: 7 mm, height: 4 mm,Sawtooth hanger is secured with screws and makes a perfect canvas hanger, picture hanger, sketch hanger or cross-stitch,Easy to using, just nail to the back of the item and hang on the wall,Come with transparent Plastic storage box and 150 sawtooth hangers, 300 8mm metal cross head screws, 6 x 7 inches microfiber cleaning cloth