I like the irwin bits, but
only this model.
We had a 1" irwin bit that we used for 10 years until someone hit a nail with it on site and completely did it in. It was getting pretty old, we knew it didn't have many sharpenings left in it. But in 10 years it drilled a lot of holes -- deep holes in green cypress, dry heart pine, plenty of oak, etc. Can't argue with that.
The owl bits simply do not last as long because the spurs are too short to withstand many sharpenings.
