English drill and construstion bits

Core Drill Bits be used for protable electric driller and bench drilling machine.there are high speed and low speed stone bits .Long lifespan and high efficiency. Include two connections .shank and thread . Diamond Drills are available from inventory in many different specifications, outside & inside diameters, drilling depths, bond types, diamond mesh sizes, mountings, & tolerances. We will work with you to determine your needs, and recommend the right solution for your specific material/application. You can count on us to improve you drilling operation to its ultimate efficiency.  ADVANTAGES: less loss of material minimum material deformation less heat generation faster drilling speed less chipping better finish quality Delivery Time：7-12 days Product Name Size Connection   English Drill For Granite      20x70L M14.M16. 5/8"-11   25(1'')   35(1-3/8'')   38(1-1/2'')   40(1_5/8'')   50(2'')   100(4")   Construction Drills Bits for Granite .Concrete Size Outer diameter Body Thickness Length of bits  28mm 27.2mm 2.8 40/400mm 32mm 32.2mm 3.0 40/400mm 38mm 38.2mm 3.2 40/450mm 44mm 44.2mm 3.2 40/451mm 51mm 51.2mm 3.2 40/452mm 63mm 63.2mm 3.4 350/450mm 76mm 76.2mm 3.4 350/450mm 83mm 83.2mm 3.4 350/450mm