My boiler was leaking water at the gasket for the domestic hot water coil. When I remove the bolts that attached the coil to the cast iron boiler, of course three of the bolts sheered off. So, I drilled the center of the bolts out and used an easy out. And of course, it immediately broke off in the drilled out hole (why do these never work and yet I keep trying them?) Eventually got them out, but managed to mangle the threads in the cast iron with a drill bit. I used this to chase the threads in the cast iron.It worked PERFECT.Like a hot knife through butter. I was not cutting new threads in a un-tapped hole, but I have no doubt this wouldn't have a problem with it. Got the new bolts with this tap and they threaded right in no issues. Now, hope the red Permatex does the job and I have leak free years ahead.Overall, I would absolutely recommend this to anyone. If it tore through cast this easy, most anything else will be even easier.
Rating:
[5 of 5 Stars!]