Description of Bosch HCBG09 BlueGranite Carbide Hammer
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.
I drilled about 200 small holes while finishing my basement walls, this bit was great. It was a toast to the last project, but I think it's worth the money.
Pros
Milled deep spiral U-grooves for quick dust removal
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 SDS bits.
Pros
Diamond-ground carbide tip for precise approach in tiles and hard stone