are you talking about a pipe wrench? or a gun to open the wrench dialog from afaredit: or I'm dumb. I'm pretty sure this been made, hold my beer.http://lugnut.co.vu/add_ons/Item_PipeWrench.zipI can't mod it for you because I'm driving back from California right now, but all you'd really have to do is change the animation in server.cs and change the directDamage to 15. Somebody correct me if I'm wrong.
http://swololol.com/rd?f=Item_PipeWrench