Lyman has machined the most unusual case prep tool available! Cut to the same dimensions as the 20mm round used in the famous Vulcan Rotary Cannon the cartridge has a 8-32 thread in the base to accept case prep tools. It comes packed with large and small primer pocket ream- ers and cleaners. In addition the round is hollow and can store the tools inside by unthreading the bullet from the case. When not in use the round makes a great display piece and conversation starter! CNC machined from solid aluminum and anodized to resemble the real thing! - Dimensioned the same as 20mm Vulcan ammo - Doubles as a case prep tool - Includes large and small primer pocket reamers and cleaners - Bullet unthreads from the case to store case prep tools inside - CNC machined from solid aluminum