Redding Reloading Premium Metric Handgun Die Set - 9MM Luger. The unique design of the special expander performs four distinct functions. The smooth entry radius is followed by the correct expanding diameter for proper press fit of the bullets. The upper section of the expanding diameter has a concentric ring which opens the case mouth slightly larger than bullet diameter to enhance bullet alignment. The final taper can provide a bellmouth on the case mouth when desired usually when using lead bullets. Specifications for Redding Reloading Premium Die Sets for Handgun Cartridges w/Metric Micrometer: Manufacturer: Redding Reloading Quantity: 1 Color: Black Gun Model: Universal Gun Type: Pistol Package Contents: Redding Reloading Premium Die Sets for Handgun Cartridges w/Metric Micrometer Redding Reloading 42172: Premium Metric Handgun Die Set - 9MM Luger