RN175 is junk
I got my RN175 from the home depot for one penny when I bought a skid of nails and I think I overpaid for this tool. It does not hold up to industrial standards. Also, when I took it in for repair the parts were more expensive than comparable parts of other brands. I have found that you end up paying in the long run with higher repair costs, more downtime, and poor reliability. I should have stuck with Hitachi.