The Single-Stage Primer Pocket Swage Tool The Single Stage Primer Pocket Swage Tool quickly and cleanly removes crimps on cartridge case primer pockets. Available in 223/5.56 and 308/7.62x51 sizes swage depth can be adjusted to accomodate various brands of cases. Swaging out the crimps instead of cutting them eliminates trims and mess. It is designed to be used on any compatible single stage press and comes with swage tool case handle and shell holder to make your job easier.