We have used these reels all over the world on single hand rods, switch rods, and spey rods. We've caught Giant Trevally, Tarpon, Permit, Brook Trout, and everything in between. These reels are all built with pride and precision. The sizing is fairly simple. The number, ie. 5 Plus indicates that it is designed for a 5-7 weight. We have used a 7 Plus Mid Arbor for everything up to a 10 weight.