15Pcs Diamond Hole Saw Drill Bits 6-50mm Diamond Hole Saw

These 15pcs multi-function hole drill bits are made of high quality emery, which is solidified by special enhanced electroplating. It has no tremor phenomenon, small incision resistance and fast-hole speed, quick chip evacuation, bringing you a nice experience when using these diamond hole saw. They are wide applications, because you can drill holes with it for marble, glass, brick etc..