Micrograin carbide-tip Router bit design – ensures consistently smooth finish cuts, with superior wear resistance Double flute design – allows for a better finish in harder materials, with smooth finish and good feed rates Strong webbing and heavy cutter backing – extend bit life, with balanced cutting and minimal vibration Reinforced shanks – feature fully Hardened and tempered steel shanks that provide ultimate durability Upgraded micrograin Carbide – engineered for precise cuts and for long bit life