Built from precision-machined aluminum, the TRICER-BR Long Lens, big glass, giant spotting scope - Arca Plate provides uncompromising stability for mounting large lenses and camera systems. Designed for full Arca-Swiss compatibility, the 4" plate pairs seamlessly with most tripod heads and gimbals. The plate includes both 3/8”-16 and 1/4”-20 mounting screws to fit a variety of lens collars, while dual safety stops, rubber traction pads, and set screws keep your setup locked down and secure—eliminating any chance of slip or twist in the field.