Review on Century Drill Tool 93201 Combo by Bart Elbrink

Worked well, remember to use a T-handle tool to hand tap and back off every 1/4 to 1/2 turn to break up chips. No wrench, you risk breaking the faucet, a mistake many people make. Use lots of cutting or light oil and this tool works great. I'm very pleased as I had to drive and cut a 1/4 inch thick hole in an automotive O2 sensor connector to make a test port to check back pressure in the exhaust system.