Masonry core drill bit is an ideal diamond tool for making holes on brick, granite, marble, and other stones. It is widely used in countertops, walls, and other projects. For our short core drill bit (wet drilling), the diameter is usually from φ6mm to φ120mm, and the segment types can be solid type, crown type, and segmented type. According to your drilling projects, the length of the stone core drill bit can be customized, and it is usually 60mm. The connection can be G1/2", 5/8"-11, M14 and shank. Please check our masonry core drill bit list as follows: Different types of diamond formulas fit different materials. Sunny Superhard Tools can provide you with the proper diamond formula to fit your material and boost the drilling project. We use high-quality artificial diamonds. Some of them are imported from Ireland Brand -"Element Six", to guarantee the high performance of our stone core drill bits. Drilling smoothly & steadily for different stones and bricks. The diameter and working length can be customized upon your requests. High-quality artificial diamonds are used to ensure high performance. Good packaging and fast delivery. 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.