`Aluminum Alloy Camera Cage Filmmaking Rig Quick Mount With 1/4 3/8 Screw Hol

The 1/4in screw hole and for Arca port design are compatible with devices such as tripods. Interface: Cold Shoes Interface, 1/4in Screw Hole, 3/8in Screw Hole, for Positioning Port, for Arca Port. Rich Expansion: Multiple screw holes around, for positioning port, cold shoes interface can be installed microphone, monitor, fill light, etc.

eBay