diamond core drilling bits for granite with thread size diameter: od6.5mm ~ od127mm thread size: 5/8”-11 thread or m14 segments type: crown or turbo type. unit price: 8$ ~ 25$ key word: diamond core bits; diamond drilling bits; drilling bits delivery time: around 30days we, johnson tools mfg.co.ltd is professional manufacturer of diamond tools which used in stone and construction industries, such as marble, granite, sandstone, limestone, basalt, grit stone, concrete, reinforced concrete and asphalt, etc.)in china, we have seven years successful exporting experience and 100 percent of our products are exported to worldwide (euro, uk, ermany, sweden, italy, spain, portug, czech, usa, south africa, ghana, egypt, australia, yemen, iran, pk, india, etc.). our main products: 1. laser welded saw blade (size from 105-1200mm, especially 700-1200mm laser wall saw blade and laser floor saw blade) 2. sintered saw blade (segment type, continuous rim type, turbo type, concave type saw blade). 3. tuck point blade (normal type, crack chasing type, two or three layers tuck point blade). 4. diamond segments. 5. diamond polishing and grinding products. 6. vacuum brazed products(hand profile wheel, profile wheel, router bits, etc. ). 7. cup wheel (single row, double row, turbo type.) 8. diamond core bits. more information about our company, please visit our website: http:// www.diatoolscn.com