VarioClip Lock extension bar for frame or system assemblies, with a specified length of 51 cm. The component is manufactured by AV Stumpfl and is identified by article number BCL-X051. It belongs to the VarioClip Lock product series and is supplied as a single piece. The product is a structural accessory rather than a screen, projection surface, or video signal device. Its net weight is 1.24 kg, and no video connectors, signal inputs, outputs, or projection specifications are provided.