Those who have been fly fishing for a several years probably have several rods for different purposes. Each rod is designed for a purpose - to cast a particular weight line. Why? Let's start with how rods are defined. The size number of the fly rod is directly tied to the size or number of the fly line intended to be cast. The numbers and sizes work like shoe sizes. To Know More Details Visit: http://www.glenndambrauskas.co.uk/a-guide-to-artificial-knees-by-glenn-dambrauskas/