Board Thread:Shadow Fight 2 Discussion/@comment-2601:147:8500:2740:E8A0:101D:186B:CA6F-20190316233602/@comment-32172734-20190317162852

"A chance to make a Critical Hit with an increased damage."

Judging from the wording in Precision's description, I think the enchantment actually creates a Critical hit. That means regular Critical hits happen independently of Precision's Critical hits. That would explain why enemies with Precision seem to crit more often.