I have a Presto actually it is the GRS 850. It is the same unit, but the GRS label made me pay too much for the tool. Any how the unit performs great. I have been using it for 5 or 6 years now without any maintenance. It does have enough torque to work metal, but its performance in soft gummy metals like copper is very slow. It actually works fairly well on steel. I don't use it much any more, but I would miss it if it was gone. I would recommend the Presto if your looking for a turbine with more torque.