The good news is that if you need an inexpensive hole saw to drill a hole nearly 6" this is a good value product. relationship is. If you need to make a 6" hole for things like ceiling lights, you might need something else. This item looks like a 150mm diameter saw blade. In fact, it's only 5.9 in diameter. It's okay if you make corn boards. It is very important when drilling a ceiling for a can light. It seems heavy enough for occasional use on relatively soft material. The price for build quality/performance seems very reasonable. Just make sure FAST a 6" hole fits your needs.