Turn any progressive press into an "ammunition factory" with the easy to use HornadyA(R) Lock-N-LoadA(R) Bullet Tubes(TM). Coupled with a HornadyA(R) Bullet Feeder die (sold separately), Lock-N-LoadA(R) Bullet Tubes(TM) provide hand loaders a fast, flexible system that increases loading speed on any compatible progressive reloading press with 7/8-14 thread die-stations. With the Lock-N-LoadA(R) Bullet Tubes(TM), the hand loader can simply pre-load the tubes with bullets and place the tube in the top of their bullet feeder die. Tubes can fit 40+ bullets depending on caliber and weight and feature a milled window for visual bullet level inspection. L Mfg: Hornady