I use my loppers for the past 4 years with only a few knicks in the blade. I use them instead of wire cutter when cutting the plugs off of appliances. I have gone thru 1" dia wire harnesses with no problems.

I even use them to cut aluminum window frames. I try to take in clean extrusions, this means removing all the screws in them but if a screw breaks all I do is cut the little bit where the screw is out with the loppers, turn in the clean extrusion and put the piece with the screw in another pile as dirty extrusion. Works well.