Haoge LVR-200CP 200mm Dual Dovetails Nodal Slide Vertical Rail with 90 Degree Quick Release Clamp Compatible with Arca-Swiss SUNWAYFOTO The Haoge LVR-200CP Vertical Rail comes with a captive knob screw clamp on the end. Precision CNC machined, compatible with all Arca-Swiss style quick release plates. The most important function of this product is that it can create a vertical component for mounting your camera. Integrated Arca-Swiss-compatible quick release clamp. Double Arca-Swiss-compatible male dovetail rail. 12PCS 1/4"-20 threaded sockets.