Trims the case to length; Chamfers the inside case mouth to an angle of 14 deg; Chamfers the outside case mouth to an angle of 30 deg; Mounts on an Original or Power Case Trimmer; Carbide cutter blades are factory adjusted on the blade holder, ensuring precise cutting; Installs by sliding over the Case Trimmer Cutter Shaft and secures with one set screw; Caliber-specific Pilots included with 3-in-1 Case Mouth Cutters designed for popular cartridges