The METALWORKS Stair/Angle Bracket Kit is a 4-piece set made of galvanized steel with a satin black powder coating. Designed by METAL WORKS, these angle brackets are 1" in size and perfect for use in stair construction. The black exterior color adds a sleek and modern touch to any home improvement project. Weighing 907 grams, this kit provides sturdy and reliable support for your staircase or angle bracket needs.