Review on Tungsten Porcelain Monster Master MM MDB 001 by Sean Spence

These drill bits work well when used. But I can't find any reason to buy them instead of another brand's bits. Aside from the fact that these are one of the cheapest masonry bit sets on Revain right now. Most other sets cost $3-4 more for the same number of bits. But these aren't branded bits (even though they're sold as such). In fact, these are ordinary bits from a major manufacturer. However, they work well enough that you can feel comfortable buying them.