The Falcon Eyes Metal Chain Holder B-Reel is suitable for all Falcon Eyes and Linkstar background systems, which can be controlled by a chain, making it easy to roll your background up and down. This metal chain is 3.54m long and can be adjusted by removing one or several chain links. The optional accessories tab below displays the compatible background systems and accessories, which can be used in conjunction with the Falcon Eyes metal chain holder B-reel. Please note: the Falcon Eyes metal chain used in conjunction with an optional Falcon Eyes B-Reel Set can be seen in the 3rd image. Background roll holder and chain rail are further optional accessories and are not included in the delivery of the Falcon Eyes Metal Chain Holder B-Reel.