Auto Axpert

Auto Axpert is a perk added to Fallout 3 in the The Pitt DLC.

"You've become an expert with the Auto Axe. You do +25% damage whenever you use it. Vroom."

It will boost the Lone Wanderer's damage by 25% when using the Auto Axe, Steel Saw, The Mauler, or Man Opener, new weapons also introduced in the DLC pack.