Useful Knots is a quick reference for a number of most practical knots.There are hundreds or even thousands of knots out there and each has its specific uses. But in everyday situation average person has no time to learn them or look through all of them and pick the best one. Useful Knots offer a selected list of the best knots for most practical situations.Knots are categorized by type and each knot has a deion and step by step instructions with pictures and guide on how to tie it.Permission to use internet is for displaying ads. Other than that program works offline.