SDS Max high impact carbide four cutter drill bits are manufactured with IRON BLAST TECHNOLOGY™, a process that strengthens the bit to resist fatigue and results in extreme durability. The redesigned, four cutter carbide head offers 2X longer life and even stands up to rebar strikes. These bits are made in Germany and are GUARANTEED TOUGH® - so tough that we are offering a NO BREAK GUARANTEE. If you have our bits, we have your back. DeWALT® HIGH IMPACT CARBIDE™ SDS-Plus® DW5810 4-Cutter Hammer Drill Bit, 3/4 in Drill Bit, 45/64 in SDS-Max® Shank, 8 in D Cutting