Finger tighten, set and forget, they never move. Just be sure to always loosen your dies by turning the ring, not the die. The rubber insert acts a friction washer to keep the lock ring in position...
Frankford Arsenal Die Locker Rings, Fits 7/8"x14 Dies, Anodized Finish, Blue, Aluminum Construction, Pack of 3 Lock Rings, Includes Lock Ring Wrench 1202448