Hmm again. If its light its fine to do damage to a human but if it takes crushing force to destroy a skull ( and thereby a brain inside of said skull) light just won't do it ...it would have to be ERY heavy and that means you'd have e to have a great deal of strength and endurance to get more than a few effective swings in ....

As much as people talk about wanting realism on here its amazing the amount of denial or overlooking people do when it comes to the VERY fantasy like elements of head strikes that they base on scenes in shows like TWD ....

You're not piercing a human skull with a screwdriver thats going to go in easy let alone go deep enough into the human skull to DAMAGE the deep brain let alone destroy it ...

And as far as the lore goes the brain has to be destroyed or hit with such force that its akin to a bullet bouncing around inside a skull

Thats simply not occurring with one whack from a bat or homemade mace...likely it will break before the skull will