1) 5 pieces of diamond drill bit 4, 6, 8, 10 ,12MM 2) with guide system and water system 3) easy to use 4)11 years's factory

1) 5 pieces of diamond drill bit ø4, 6, 8, 10 ,12MM2) with guide system and water system3) electroplated diamond,easy to use

4) the diamond grid is 46#

5) package: double blister

6) easy to use and high efficiency

7) safety and scientifically

Diamond Hole Saw Set