My wife was as excited about this purchase as I was so I had to share it with someone! Since my old one(25-30 years old) finally stopped I needed a new weapon against a possible zombie attack. I think this should work... You have to test your weapon right? Make sure it's reliable. Here is the results of it's first outing. 18" bar, the bigger tree I downed today was 16-17" at the base and this thing cut right thru it. I knew the saw I was old but I'm surprised at how much less I'm working to cut things. I was debating between this model and one a bit larger but I think this one will do everything I need it to. NOTE: I IN NO WAY SUGGEST USING A CHAINSAW AS A WEAPON!!!