... ,Directional aerodynamics always presents the cutting blade forward5, Premium copolymer formulation for commercial toughness 6,Aerodynamic design ... creates less resistance generating less noise7,Added rigidity for improved cutting and long lasting 8,Accept OEM orders9 ... Professional Grade.Color:any color available upon clients' requirements.Shape:round, trigon, square,star,hexagon,heptagon,twist,saw ...