Blade E120 Heavy Duty Blade with B20 cutting edge (E120). Standard size E100 geometry heavy duty blade made with a B20 cutting edge head (E120). The E120 has a smaller B20 curring edge style which rotates clockwise and counterclockwise made with hi-speed steel. Deburrs materials with spiral chips, Great for Straight Edge and Hole Edge applications and Good for use on Brass, Cast Iron and Plastics.