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