A bit more money but starret has been the best I've used hands down.
http://www.wttool.com/index/page/pr...ct_name/FastCut+Bi-Metal+Hole+Saws+(Starrett)
Watch out for the new style lennox saws. They decided to make a big vent hole in the side of them, I assume for cleanout and cooling. It's just large enough for a piece of the notch to fall through and catch on the tube. I've almost broke my arm a few times now with my 1/2" drill and everytime it happens it destroys the hole saw. Which really pisses me off!!! Especially if it's a new saw.
Yep no oil here either, I dont seem to get any more life out of them with it.
Jim have you sprung for one of the carbide tipped holsaws yet. I'd imagine they are tits.
http://www.bandsawbladesdirect.com/lenox-carbide-tipped-hole-saws.php
The Fastenals are made by Lenox .Fastenal's store brand, I think it's Black Forest, is a good blade and fairly priced. When I bought mine, it was several bucks cheaper than the Lenox, and looked like it was built better.
The Fastenals are made by Lenox .