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. Widely used in panoramic and close-up photography 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.