Keough\’s Tyer\’s Grade Cape. Bill Keough has worked hard to produce high quality genetic hackle at an affordable price, and his hackles are a tremendous value. His Tyers Grade Dry Fly Cape has taken the fly tying world by storm due to its quality, feather count and low price. As an all purpose dry fly cape for flies size 4 16 it is an unbeatable value. The colors are excellent and the quality control is consistent.