Description of π¨ Bosch HCBG15 Carbide Hammer with BlueGranite Technology
Robust head provides 4X longer life. Various useable lengths. Milled u-flutes with deep-cut spiral for fast dust removal. Diamond ground carbide tip for precise starts in tile and hard stone. PowerGrip shank for aggressive gripping power.
These bits work very well in concrete in my cordless hammer drill so I think they will work even better with a corded hammer drill. That's a big difference between the free bits you get with a tap set and that's about all I've ever used in a Hilti impact drill other than the SDS bits.
I was only able to drill two holes in my concrete deck, after that it became dull and I couldn't drill any more holes. I just can't believe all the positive reviews for this drill. One customer said he drilled over 60 holes with this drill. This is chewing gum "Malarki"! This drill dulls after the third hole and won't drill more holes in my concrete patio. And yes, I used a network puncher. Very disappointing. It's hard to believe that people give this beat such a positive review.