A couple of years ago a new type of line hit the market that was said to have the same light index as water, meaning that is was virtually invisible under water. Where I've begun utilizing this type of line a lot is in tying up spinners. The main reason I use it there is, because it is so invisible, instead of using a line like Trilene 10 pound test XT like I use to, I can now switch up to 14 or even 17 pound test Berkley 100% Fluorocarbon line. It's great using the larger pound test Fluorocarbon because it makes the spinners more durable, it makes it harder for fish to break off, and the rigs will last longer than ones tied on lighter line. So by using Fluorocarbon, you can increase the line test you use and end up with a much better spinner.