Mepps Color Technology studies have proven there are times when a highly-visible lure is needed to attract fish. The bright fluorescent finishes on the blades of these Mepps Aglia spinners allow them to be seen when most other lures fade into the background. They are perfect for fishing stained or muddy water on dark days. Every trout angler should have this kit in his arsenal. Perfect for stream or lake, these spinners will catch brookies, browns, rainbow trout and grayling.