Review on 💎 Diamond Porcelain Circular Drill Bit - Drilax010085 by Andrew Williams

Based on my observations, this is not a great option for hole saws. Although it is marketed as an industrial and scientific product, I found it to be of poor quality. It barely scratched the surface and was not effective in drilling even the simplest of holes. The only positive is that it did come with a useful guide, but it's not worth the investment for such unreliable results.