Good. I am 100% confident that the hammer drill will cut through masonry faster than regular traditional drills. That's what perforators are for. Then why would a company make a set of masonry drill bits that explicitly state in several places on the packaging that the drill bit is not designed for use in IMPACT MODE. It makes no sense. It's like saying that carbide blade you bought for quick rough cuts in wood should not be used on a saw that runs faster than 10 RPM. For real? That's why it's 3/5 stars. I don't know the reason for the tag. Perhaps the company wants to avoid any liability for "rough drilling". But wouldn't drilling into some of the densest materials on Earth be considered "rough drilling"? Who knows. I hope to use them soon and comment on how they actually work in a puncher where their use is banned.