Some double casement windows are rebated into each other - the way French doors are - without a mullion. On some older windows, a casement catch with a long throw length is required to help span the gap that can develop when the timber swells and shrinks. These black window catches are made of solid brass and feature a long throw tongue to bridge this gap and secure your casement windows shut. The elegant teardrop handle design elevates the look. They come with the keepers and screws included for easy installation.