Detailed Product Description Multi-purpose Masonry Drill Bits1. We could produce ... etc;2. Using special high quality carbide tip, and 40Cr or better material for body; 3. Heat- ... etc, could drill holes on cement, block, granite, and other stone with hammer drills.6. Using impact drill ... 5000mm, and could drill on normal material with better drilling effective.7. To meet different purpose with different ...