Hornady New Dimension Series II Three Die Set for 9mm Luger Handguns 546515 is an expertly crafted reloading tool for 9mm Luger handguns and pistols. The Hornady New Dimension series is known for its high quality and efficiency-improving features, all of which make hand loading cartridges a much less painstaking process. Hornady's Zip Spindle threading design is the hallmark of all New Dimension dies, including the Hornady New Dimension II 9mm Luger 3 Die Kit, allowing the savvy hand loader to tighten the spindle lock without straining their hands. Wrench flats on this gunsmith and reloading] tool makes it easy to fine-tune the die, as does the compression washer and retainer ring. These Hornady reloading die also include a sliding alignment sleeve, which holds the bullet, case neck, and seating stem in perfect alignment for a straight seating with a minimum of effort. Designed specifically for 9mm and 9x21 cartridges, the Hornady New Dimension II Three Die Reloading Set takes a lot of hassle out of the reloading process.