... for oil/mining drilling bits. Different shapes and sizes, such as cylinders, triangles, rounds, rectangles, sharps, cubes, etc. Rectangle:1.5*1.5*3.5 ... ,1.5*1.5*4,1.5*1.5*5,2*2*10,3*3*10,4*4*10,etc.Triangle ... cutters, etc. It can be applied on the drill bits for oilfields. Thermal Stable Polycrystalline Diamond 10*3.5*3.5