We specialize in the production of diamond drill Sharp,wear-resisting Don't jumping edge Long service life Punch least 2500 Diamond grain size: 80 #-100#.Diameter: 5mm - 100mm.Total length: 70mm,75mm,90mm,95mmDig holes. 2500+ ---- 4000+(use Diameter 6mm bit and thickness 6mm glass) Classed by suitable equipments :1. Straight shank2. Cone shank3. Threaded shankSegment Height: 10mmWall Thickness: 0 ...