The Riser Baseplate with ARRI Rosettes from Niceyrig is a sturdy universal riser baseplate kit made of aluminum alloy with an ARRI-style clamp on the bottom to facilitate quick release operation with an ARRI bridge plate. The dual 15mm rod block takes two separately available, industry-standard 15mm rods of any desired length, and both a 1/4"-20 and 3/8"-16 screw are included for mounting your camera.