The SmallRig 2144 Quick Release Clamp and Plate ( Arca-type Compatible) includes an Arca-type clamp and a plate. The tightness of the clamp can be adjusted by stirring the tiny screw on the lever, so it is also cross-compatible with most Arca type plates. The plate is attached to the bottom of cameras or cages by screw(s). The clamp features multiple 1/4’’-20, 3/8’’-16 threaded holes and thorough mounting holes on the bottom, so you can mount it on tripods, jibs and other devices.