1、Wide Compatibility: This lens collar replacement foot is tailor made and compatible for EF70‑200mm, for EF100‑400mm, 18‑110mm lens, can't be used with other lens, otherwise, it won't fit. 2、Adjustable: The bottom of the lens bracket base is 85mm detachable lengthening quick release plate, with 1/4 inch and 3/8 inch screw holes and stainless steel anti slip screws at the bottom. You can adjust the lens and tripod to the right position. 3、For Arca Quick Release Plate: It is compatible for Arca type quick release systems, which allow you attach your lens to tripods, ball heads, clamps or for Arca standard panoramic heads. 4、Long Lasting: The tripod collar mount ring stand is CNC machined with a hollow weight saving design, polished and surface anodic oxidation, exquisite workmanship for durability. 5、Easy Installation: Simply slide the lens into the base slot and rotate the knob for quick and easy installation, no complicated procedures required. Lens collar replacement foot is very convenient to use.