Product DescriptionAssure your mixed brass is bulge free with the Lee Bulge Buster Kit and an appropriate Lee Factory Crimp Die (die sold separately). This push-through die adapter quickly removes low-base bulge rings that shell holder-constrained sizing dies can't reach, helping improve function and reliability in reloaded pistol ammunition. The kit installs and operates easily on a compatible single-station press setup, pushing cases through the carbide sizing ring of the Factory Crimp Die to iron out bulges.Product Highlights Push-through base sizing adapter designed to remove "bulge rings" from rimless pistol brass Works with an appropriate Lee Carbide Factory Crimp Die (not included; required per caliber) Helps improve chambering and reliability by sizing the case near the base Includes extension sleeve, push-through punch, catch container, and instructions Compatible with multiple rimless pistol cartridges; not intended for 9mm LugerSpecs Brand: Lee Manufacturer Part Number: 90487 UPC: 734307904876 Product Type: Bulge buster / push-through base sizing kit (die adapter) Required Accessory: Appropriate Lee Factory Crimp Die (not included; sold separately) Included: Extension sleeve, push-through punch, catch container, instructions Compatible Cartridges (rimless cases): .380 ACP, 10mm Auto, .40 S&W, .357 SIG, .400 Cor-Bon, 41 Action Express, .45 ACP, .45 GAP, .45 Winchester Magnum Notes: Will not work with 9mm Luger Country of Origin: United States of AmericaDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.