Wimberley P-40 Lens Plate Arca-Swiss style quick-release plates for collared lenses that attach to the foot of your lens Lightweight, Ergonomic, and solid connection. Dual Safety Stops Anodized 6061 Aluminum, stainless steel fasteners Made in USA. Assembled in Charlottesville, Virginia For Compatibility Please see https://tripodhead.com/products/lens-plates-main.cfm