The Kong Futura is the smallest and lightest hand ascender available. With its intuitive design, its easier to use than other ascenders. It literally "fits in the palm of your hand" and you grip the Futura ascender in the same way you would grip the rope itself. The angle of your arm and hand relative to the rope feels just right.. Milled aluminum body with an ergonomically formed hard plastic handle grip. Comes with two interchangeable hand grips to accommodate different size hands. Only 139mm high - about the same size as your hand! For use on 8-12mm ropes. Choose from Left or Right handed versions.