【Universal Height Adjustable Baseplate】SmallRig 4233 included in the set is a bottom plate for Manfrotto-type 501-compatible, a top plate for Arca-swiss with two 1/4"-20 mounting screws, and a height-adjustable base. It works with dual 15mm rods and it is designed to make it easy for users to install accessories such as follow focus, matte box, lens support, etc 【Strong Compatibility】The top width can be quickly adjusted through a knob, ensuring compatibility with most quick release plates for Arca on the market, eliminating any compatibility concerns. And the base gives you 0.8" of vertical adjustment and can support most mirrorless cameras and lenses 【Two-Stage Locking Lever】The locking lever features a two-stage unlocking design and includes a built-in anti-dislodgement pin, preventing accidental contact, to protect the equipment safety 【Top Plate for Arca-Swiss】The included top quick release plate for Arca is compatible for DJI RS series stabilizers, allowing for quick transitions between handheld, stabilizer, and tripod setups. Besides, the top plate features two 1/4"-20 screws within its sliding slot to mount your camera or cage 【Modular Design】The top of the Mount Plate features a modular design, making it easy to switch its orientation for compatibility with cages and telephoto lenses to adjust the center of gravity and support vertical and horizontal filming. Also, when disassembled the top of the Mount Plate, it can be used independently as a mount plate for Arca-Swiss/ for Manfrotto 【Mounting Points】Additionally, built-in 1/4"-20 threaded holes and 3/8"-16 threaded holes at the bottom of the base, expandable quick release plate for easy mounting to a tripod