... 1.glass diamond drill bit 2..Sharp,wear-resisting 3..Not jumping edge 4.Long service life 5.Good concentricity Manufacturer of ... Application: glass, Ceramics,cameo, stone, agate, sheel, tile and other hard materials4.Complete specification: Straight shank, Taper shank , ... 1-15 Days according to the quantity10.Package:Standard export package: Manufacturer of taper shank glass diamond drill bit with ...