These look great and I searched all over the west coast for this size. Unfortunately, none of the local or national distributors had them in stock. Needed to order direct from Michigan. I didn't have the time to wait for them to ship.
FYI, they also are sold under the
Hougen brand or
Klein Tools (electrician tools sold via Home Depot) has a similar design.
I was able to find a Lenox Bi-Metal hole saw at Lowe's for under $20 and was impressed with the quality of the holes it cut.