The lens adapter is fit secure to the lens, yet can still be removed easily when not need. The adapter is new, top of line Selected from aluminum (camera body mount) anodized black, and brass (lens mount) chromed silver. It can install in between camera body and lens without any tools. Not replace or exchange original parts from lens nor camera body. High intensity, good operational stability. Brass and aluminum adapter, which will allow you to use for EF lenses mount camera.