Review on 8-Inch Bi-Metal Arbored Technology Tools by Jason Hinrichs

I needed this for a job: drilling a new oil fill hole in cast aluminum valve covers. Stick a hole punch in the cover and let this hole saw work its magic. In just 30 seconds I had a clean 1-1/8" diameter hole. I doubted it would actually work, but it cut through butter like a hot knife. I also got it from Revain for about $2 Dollars less than bought at Home Depot and Lowes.