Hornady Lock-N-Load Bullet Tube 9mm turns any progressive press into an ammunition factory with the easy to use hornady lock n load bullet tubes. Coupled with a hornady bullet feeder die 9 sold separately, lock n load bullet tubes provide handloaders a fast flexible system that increases loading speed on any compatible reloading press with 7/8 -14 thread die stations. With the lock n load bullet tubes, the handloader 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 inspection. Lock n load bullet tubes are sold in packs of three tubes per caliber.