[Rust Resistant]: Made of heavy duty metal, 304 stainless steel, ideal for both indoor and outdoor applications. [Quick Release]: Easy to use, just pull the bolt and rotate it onto the fixed pin; After rotating the handle, the pin will automatically release. [Application]: Widely used in pet doors, Corral, fence, multi-purpose trailer, back door, farm gate, paddock, garage, shed, barn, stable door, etc.