In response to the cutters, I used the Greenlee and really liked the clean holes they cut...however I have several in different sizes that have bad tips (broken by the "careless underlings" who try to force or twist the cutters. I have tried finding someone who can re-tip these cutters since they have carbide brazed on them. I haven't found anyone who can do it yet. Generally the problem is that these are in a radial configuration unlike a carbide saw blade. I guess it is too difficult to do this properly without charging an arm and a leg. Didn't know about these others...what is the cost for these...say a set for 1/2 - 1 1/4"????
