This is an Arca-Swiss compatible clamp for Manfrotto Befree tripods, made by Hejnar Photo. Product information is available on the following English page: https://www.hejnarphotostore.com/BeFree-Tripod-Clamp-p/befree-clamp.htm It is designed to improve the compactness of the tripod when folded. There are some scratches on the corners.