The Lee case collator can fill all four Lee case feeder tubes in just 10 seconds. Brass falls base down into the drop tubes, making progressive reloading with the Pro1000 or load-master presses that much easier. To use lay cases in collator and they will fall base down into the drop tubes (not included). specifications: - fits: Lee Pro 1000, load-master progressive press - function: case collator - material: plastic