The Lee Precision 5.7x28mm FN Full Length Sizing Die is a precision reloading component designed specifically for resizing 5.7x28mm FN cartridge cases to factory specifications.Lee Precision Full Length Sizing Die OnlyChambered for 5.7x28mm FN cartridgeFull length sizing for complete case reformationIndividual die component (not a complete die set)Precision machined for consistent case dimensionsEssential for reloaders working with 5.7x28mm FN ammunition this sizing die ensures proper case dimensions and reliable chambering in firearms chambered for this cartridge.