I have one of these and for some reason it just doesn't work well. IE: try to cut and it just stops, sort of binds up and hisses. I start on an angle to get more tooth contact with metal and ease into cut then about 2 seconds it just stops and hisses, like WTF!!! Running 90 psi and fine tooth blade. I tried using it and just got frustrated so put it in tool box and there it sits...