yotijay 4 Pieces 100 Grinder Grinding Head Set 6mm 8mm 10mm 15mm Diameter for Marble.100 grinding head set is made of high manganese steel and emery, high strength, anti impact, wear resistant, sturdy, not easy to break and deform, and ensures a long time to useM10 threaded interface grinding head tips, suitable for 100 type angle, is convenient to use.The package includes 4 polishing bits (6mm 8mm 10mm 15mm Diameter), length 63mm 45mm 45mm 41mm/2.48inch 1.77inch 1.77inch 1.61inchThe angle grinding head tips are suitable for grinding marble, granite, quartz and other stone countertopsThe angle grinding bits can be used without adding water, suitable for dry cutting and trimming, providing effective processing results100 Angle Grinding Head Tips . Polishing Bits 6mm 8mm 10mm 15mm. Angle Accessories Easy Installation. Marble Granite Countertop Grinding Head. Emery Trimming Attachments High Strength.