National Hardware's butterfly decorative gate hinges are designed for a variety of outdoor applications, including wood, steel, or vinyl. Black plated steel finish for style and durability. Installs with included hardware in both left and right handed applications. Includes 2 butterfly hinges and all mounting hardware for easy installation. Animal safe product designed to prevent animals from accidentally opening gate doors, sheds, or stalls. National Hardware's Lifespan Limited Lifetime Warranty