Product description diamond core drill bits for fushan fz100b machine top professional manufacturer 10 years drill 4000-5000 holes low cost product feature 1.feature: durable to polish and not crack, high efficiency, long life, drill 4000-5000 holespc product specificationmodels 4.complete specification: straight shank, taper shank , thread shank. Special specification can be made according to the requirements of customers. 5.size: diameter: 4mm-150mm 65l.75l.95l application glass, ceramics, cameo, stone, agate, sheel, tile and other hard materials other information diamond core drill bits for fushan fz100b machine (popular in europe market)