Lee Bulge Buster Kit and the appropriate Lee Carbide Factory Crimp Die assures your mixed brass is bulge free. This push through die adapter will quickly remove the annoying bulge rings that shell holder constrained dies simply can't reach. The Bulge Buster Kit includes: extension sleeve, push through punch, catch container and complete instructions. The Lee Carbide Factory Crimp Die is required and must be purchased separately.** Will only work with the following cases: 380 ACP, 10mm, 40 S&W, 41 AE (Use 40 S&W Factory Crimp Die), 45 ACP, 45 GAP, and 45 Win Mag. For use in single station press or a turret press with the index rod removed.