Hornady Lock-N-Load Bullet tubes can fit 40 plus bullets depending on caliber and weight and feature a milled window for visual bullet level inspection. Lock-N-Load Bullet Tubes are sold in packs of 3 tubes per caliber. Lock-N-Load Bullet Tube feed bullets into existing Hornady bullet feeder dies. They eliminate the need for a bullet feeder hopper. The milled window in tube shows when it is almost empty and are suitable for any progressive press with 7/8-14 thread die-stations.