The cylindrical fenders can be easily mounted on the hull of the ship with a longitudinal chain. The fender can be supplemented by webbing straps or sleeved chains which fit in special grooves. The ends of the fenders can be tapered to get a better connection to the hull. Large cylindrical fenders are often used as the primary pushing fenders on the bow or stern of modern tugs. Their round shape is ideal for working with large bow flares (like containerships), but are equally good for pushing fl at-sided vessels.