Works great in CPVC (PEX) for drilling and tapping some small brass mist nozzles. Well, of course, any old piece of steel should drill through PEX easily. But the threaded part also came through perfectly with a very clean cut. Here are some photos of my "fog stick". I checked brass spray nozzles. If you are interested, you can find the history there. 22pcs Brass Outdoor Cooling Spray Nozzles 0.012"(0.3mm) Hole 10/24 UNC by Aootech.