R3™ PLUS patented carbide drill bits are the perfect match for your Ramset™ DynaDrill™ or cordless rotary hammer. Together, they form a powerful concrete drilling system to get the job done faster. R3™ PLUS carbide comprises tough tungsten carbide head design and 4 spiral flutes for faster waste removal and drilling speed. R3™ PLUS Carbide and Chisels fit all SDS Plus machines and previous Ramset™ model 63 Series tools. R3™ PLUS carbide drill bits are also available with 4 cutter heads for greater performance and drilling accuracy.