Review on Milwaukee 49-56-0127: High-Quality 8 Inch Hardened Hole Saw for Superior Performance by Carlos Barete

I've had to cut through thick PVC (electric PVC transition) and it worked. Just make sure you have a standard speed drill and not a cordless drill "couldn't use this at the low RPM that the cordless drill produces. I also believe you need an arbor to use it as well. The arbor holds the hole saw in place. Mine came with one built in though Dorn I need to set a guide bit I just wish they weren't so expensive.