Bosch round hammer drill bits deliver 4x life vs. Standard masonry bits. These bits feature asymmetric diamond-ground carbide tip for precise starts and less bit walking. The bit heads were built to be robust with the best quality to resist the toughest jobs to last longer than standard masonry bits. They have milled u-flutes with deep-cut Spirals for fast drilling in Block, masonry, and concrete. The grip shank provides aggressive gripping power.