iShoot L-shaped Vertical Quick Release Plate / Camera Grip Holder Bracket Special for Canon EOS 5DS 5DSR 5D MARK III Compatible with RRS / ARCA-SWISS / KIRK Fit Ball Head Aviation aluminum,made in China Specifically for Canon EOS 5DS/5DSR,also compatible with Canon EOS 5D Mark III Rugged one-piece design, cradle structure, with non-slip screw Doesnt affect the battery compartment opened,the installation and use of data cables 39mm AS standard interfaceweight is only around 95g