Features of the diamond drum core bit include:
• Sintered diamond segments for drilling granite and other types of hard stones
• Vacuum brazed diamond on bit body to function as a diamond drum wheel
• 2-inch drill depth/drum wheel length for grinding 3cm granite easily 5/8-11 thread
• Sizes include 1”, 1-¼”, 1-3/8”, 1-½”, 1-¾” and 2”
• Maximum speed: 8000 RPM
• Use dry or wet (wet use recommended)