Models with this Special Rule can make a Special Close Combat Attack at its own Initiative against a single enemy Unit in base contact. This attack deals a number of hits equal to the value stated within brackets (X). These automatically hit and have a Strength equal to the model's own Strength. Grinding Attacks never benefit from any Equipment or Special Rules the model may have (since they are Special Attacks). If a model has both Grinding Attacks and Impact Hits, it may only use one of these rules in the same combat phase (you are free to choose which). If a multipart model has this rule, then the rule is only applied to the part of the model that has the rule.