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.