Key Features Airfoil designed specifically for traditional flybar helicopters Integrated lead weight safety harness 4 x 1mm and 4 x 2mm shims included 2 x 4mm bolt hole bushings included Overview EDGE high performance CF rotor blades are premium blades that have been specifically designed for today's model helicopters. EDGE rotor blades have been optimized for use with light weight, high powered models with increased cyclic pitch. While these blades are ideal for aggressive competition winning 3D performance, they can also be used for more nimble and intermediate flying styles.