In the first two days I knocked out about 20 boxes of 4 11/16 with 1" and 3/4 holes and I can say it performs well. because it's new but still) Another thing worth mentioning is that not only does it come with an extra (rebuild) set of gaskets, but there is also a manual listing the parts you can buy for the tool (not the best, but better than the well known brands i will try) do an extra review in a year but i am sure this tool should live its life cycle of 2 years, as an electrician it will bring a lot of use!