The Rollsizer Caliber Conversion Kit .38 Spl / .357 Mag is designed to reliably process revolver brass in .38 Special and .357 Magnum. It includes all caliber-specific components required for use with the Rollsizer Automatic Decapper Base Unit. Thanks to its robust construction, the kit is ideal for reloaders handling high volumes of both calibers efficiently and trouble-free. Tool-free caliber changes allow for fast adaptation to different case types.