The diamond core drill bit(other names are diamond hole saw, and diamond core hole saw bit) is widely used in drilling materials of concrete, stones, pavers, road, glass, etc. The drilling projects can be holes making for installing pipes or core taking for other projects like the blind road. Different projects need different sizes of the core drill bit. Sunny Superhard Tools can customize the right size of core drill bit to fit your project. This 100mm diamond core drill bit is designed for drilling natural stones like granite, marble, etc. Different stones have different hardness and need different diamond formulas to cut them. Sunny Superhard Tools specifically developed great diamond segment formulas in various shape for drilling different stones. The "Roof" type core bit segment can start the drilling quickly and have excellent sharpness. Features: 100mm diamond core drill bit for stones. Imported diamond from Ireland company - "Element Six" Roof type core bit segment for fast drilling. Excellent core bit segment formulas to fit different stones. The diameter, length, and connection type can be customized according to your drilling project. Optional Size of diamond core bit (other specifications are available upon request) OUTER DIA. DRILL DEPTH Connection Type Segment Type Segment Height mm mm mm Φ6 50 G1/2", 5/8"-11, M14, shank Solid 10 Φ8 60 Solid 10 Φ10 60 Solid 10 Φ12 60 Solid 10 Φ14 60 Solid 10 Φ16 60 Solid 10 φ18 60 Solid 10 φ20 60 G1/2", 5/8"-11, M14 Crown 10 φ25 60 Crown 10 φ30 60 Crown 10 φ35 60 Crown 10 φ40 60 Segmented 10 φ45 60 Segmented 10 φ50 60 Segmented 10 φ55 60 Segmented 10 φ60 60 Segmented 10 φ65 60 Segmented 10 φ70 60 Segmented 10 φ75 60 Segmented 10 φ100 60 Segmented 10 φ120 60 Segmented 10 Other specifications can be customized upon your requests. Diamond Core Drill Bit Segments and Magnet Holder for Retipping Stone Core Drill Bits