... electroplating fast speed and good use Sintering glass drill bit with threaded shank or taper shank introduction:Diamond glass driller: using high quality ... 4000-5000 holes/pc2.Main Market: Europe market.3. Application: glass, Ceramics,cameo, stone, agate, sheel, tile and other ... according to the quantity10.Package:Standard export package Sintering glass drill bit with threaded shank or taper shank