NANIWA Welded Diamond Dry Core 21, Diameter 8 x M10, FM-2204

Easily attaches to disc grinders. Makes conventional drilling easier and faster. Amazing drilling speed. Positioning is possible without a guide. No water or curing required, making cleanup a breeze. Tip diameter: 8mm Hole diameter: M10 Effective length: 30mm Total length: 60mm Compatible disc grinders: Makita, Hitachi, Ryobi, Bosch, and others.