This Quick Release Camera Cage Base V2 from Falcam is form-fitted to accommodate the Sony a7 III, a7S III, and a7R IV. The lightweight aluminum alloy cage base offers quick release compatibility with Falcam F22, F38, and F50 accessories and has a 1/4"-20 screw to facilitate camera mounting. The base also has anti-skid pads for keeping the bottom of the camera from sliding and getting scratched.