38mm sintered Diamond segment hole saw drill drills PILOT BIT 1 1/2" 1.5 inch
You can find that under a microscope. You can adjust or remove the pilot bit by hex. 10mm (3/8") shank. CAN DRILL 60mm (2 3/8") deep. Our products are in use at many of the larger projects such as the HK airport and HK Disney Land.