The RDNG 7mm Carbide Sizing Button Kit makes inside neck sizing smoother and easier without lubrication. This precision reloading component allows you to upgrade your die sets with advanced carbide technology.7mm Carbide Sizing Button Kit (SKU: RDNG-49283)No lubrication required for smooth operationFree floating design self-centers in case neckCompatible with bottleneck cartridges 20 through 338 caliberIncludes carbide size button retainer and spare decapping pinPerfect for reloaders seeking improved efficiency and consistency in their ammunition preparation process reducing steps while maintaining precision sizing quality.