Multi-Purpose Rail Nodal Slide Dual Dovetails Clamp is widely used in panoramic and close-up photography, it supports for Arca Swiss. Double dovetail allows you to mount the rail to an Arca clamp and combine with a bi-directional clamp for incredible versatility. The most important function of this product is the option to accurately find nodal point in panoramic photography, which can realize the maximization of seamless stitching of panoramic photography. In close-up photography, you can slide the camera in and out without moving the tripod. With 38mm standard AS interface, compatible for RRS, for Arca-Swiss, for KIRK, for Wimberley, for MARKINS, for SUNWAYFOTO, for kangrinpoche, for BENRO, for SIRUI ball head of AS standard interface. (Note: the item can not fit Level-Release System of RRS/Markins/Vanguard and other brands) Features: CNC machined from lightweight aircraft-grade aluminum alloy, sealing it against corrosion and abrasion, has two safety stop screws on back of plate. The Camera Quick Release Plate Standard dual dovetail design, with high contrast built-in bubble level to improve alignment. Scale on both sides of the rail to adjust the nodal point conveniently and accurately. Quick Release Clamp with screw-knob helps you locking equipment quickly. Designed with 8pcs UNC1/4" screw thread for extended function. Accurately find nodal point for panoramic photography. It is widely used with fish-eye-lenses and wide-angle lenses. Safety stop relief grooves for protecting your camera from accidental drops. Specifications: Brand: Andoer Model: FNR-140 Material: Aluminum alloy Color: Black Screw Thread: UNC 1/4"-20 Jaw can be opened from 38mm to 45mm Fit: For PU-50/PU-60/PU-70/PU-100/PU-120/PU-150/PU-200... Item Size: 14 * 3.8 * 1.5cm / 5.5 * 1.5 * 0.6in Item Weight: 131g / 4.6oz Package Size: 18.8 * 4.7 * 3.2cm / 7.4 * 1.9 * 1.3in Package Weight: 164g / 5.8oz Package List: 1 * 140mm Nodal Slide Plate Quick Release Plate Clamp Adapter 1 * Hex Wrench