От 15688 (11,122 – 5·22·48) 04.11.2009 (Обновление 3.2.2)
This gives you a chance to gain a combo point while using Fan of Knives, if at least one hit crits. (And considering you'll be using it in multiple enemies scenarios, and that each target has two chances to crit, it's very likely to score at least one crit)