…you can sharpen it fairly easily to extend the life of your fly. This RLS Rat-a-Tat had an unfortunate encounter with a rock, dulling its point. Not to worry! Out came the mill file, and a few strokes later we’re ship-shape and sticky sharp. This fly is now a year-and-a-half old and no worse for the wear. News flash: the biggest striper I ever caught came on a big flatwing that was four years old and had undergone numerous sharpening.