1/4 inch screw hole design, can be easily mounted to a tripod-, freeing your hands. fast- and stable auto-focus and IS image-stabilization function, clearer and more photos. fast- EXIF- information transmission and electronic control. Specially designed replacement for EF EF-S lens to R RF mount full frame cameras. Comes with a practical wrench, for adapter installation and removal. with exquisite workmanship, powerful and sturdy, rust-proof and impact-resistant.