Bihui Diamond Brazed Core Bit Set in Aluminum Case 7 pcs

Professional quality diamond core bits designed for easily boring the porcelain, marble and granite tile.  May be used dry or wet. Vacuum brazed diamond bits M14 or 5/8"-11 thread to angle grinder High speed and long life (11,000 suggested RPM) Suitable for drilling porcelain, marble and granite 7 piece kit includes: 1/4" Diamond Core Bit 5/16" Diamond Core Bit 3/4" Diamond Core Bit 1-3/8" Diamond Core Bit 2" Diamond Core Bit 2-3/4" Diamond Core Bit 5/8"-11 Hex Adaptor for Electric Drill Aluminum Hard Case