This item can be used by really small boats, starting at 10 and going up to 1140 for the smaller boats, such as small yatchs for private use. A medium size for a Hall Anchor goes from 1290 to 6450 kgs, which is what is mostly used in conventional shipping industry, such as in oil & gas inspection vessels. The bigger sizes go from 6900 to 16100 kgs, with utility on the larger boats, such as container ships and gas tankers.