Im not a pro so I cant speak for sure, but I can tell you this, there was a plum tree next to my driveway that had to come out, so when I put the saw to it, it got its revenge inside the stump was a steel rod covered in copper (about 3/4" round, a foot out of the ground and I would say 2 foot into the ground) needless to say I was getting a new chain after that, but the tree was doing alright with it in it, it was about 4" inside the tree completely covered over by the tree.