Sure-Lock Lock Rings Lets you make precise adjustments of all standard 7/8"-14 dies and accessories. The lock rings clamp around the whole die. Can’t damage the threads. Applies constant pressure across the threads to hold the ring in place. Most other die rings lock by jamming a set screw directly into the threads. Features wrench flats so you can remove and replace dies without pliers ruining the lock ring. Includes 1 Lock Ring.