Package of 5 die lock rings.
When you are first setting up a "naked" machine, there is plenty of wrench room, but if you have a need to adjust a die afterward, it often requires a delicate touch to maneuver a lock ring on a crowded toolhead.
Dillon Precision has addressed this by now offering new 1" die lock rings, these new lock rings fit any standard 7/8" x 14 dies.