1. Diamond hole saw, core drill bit

2. Used for drill glass, ceramics, porcelain,  porcelain tile, limestone, slate, marble,granite, stone and fiberglass.
3. Dry & wet cutting

4. Size: 1''-6'' (25mm-152mm)

5. With length: 150mm(6''), 200mm(8''), 250mm(10''), 350mm(14''), 400mm(16''), 450mm(18'')