NAME: Welded Diamond Drilling Core Bits (Wet) for drilling Marble, granite QUANTITY: 1pc SPECIFICATION: Diameter: 20mm, 25mm, 35mm, 40mm, 45mm, 50mm, 68mm,75mm, Diamond height :8mm; Total length: 68MM , Thread: M14 or 5/8-11 thread, Grit: #35/45 FEATURE: Wet drilling Multi purpose for drilling Marble, granite, artificial stone, Tile.......... Solid drilling bits less chips, not easy to break off High Grade and Special bond matrix extends drilling life and improve the working efficiency ------------------------------------------------END---------------------------------------------------------