Comments posted to our Dark Souls 3 Wiki
This doesn't straight up break locks, but it does redirect locks if there is a secondary target nearby. Had it happen multiple times in fight club.
It's called the milk ring because skeletons drink milk instead of estus.
Hefty bone milk.
Time for calcium
Tested this with a dark hand and with continuous rolling the red particle effects completely disappear, even after the milkring invisibility wears off.