DT DIATOOL Diamond Drill Bits Kit 20/28/35/55/68mm with 20mm Finger Bit and Hex Adapter for Tile Porcelain Marble Granite

Products contains 5-Piece Core Drill bits(20/28/35/55/68mm)+20mm Finger Bits+Hex Adapter, total 8pieces/Box Core Drill Bits are designed for Dry/wet drilling porcelain tile, granite, marble, stone. The thread of all bits are M14. Hex Adapter could change the connection of diamond bits from M14 to Hex shank. Finger Bit can enlarge, shape on round bevel existing holes in porcelain, hard ceramic, marble and granite Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5 times)