... *4,1.5*1.5*5,2*2*10,3*3*10,4*4*10,etc.Triangle :4*4*4*2.6,4*4*4*3 ... ,6*6*6*4.5,6.2*6.2*6.2 ... .8*4,2*4,3*8,4*10,5*10,6*10, 6.3*3.3,6.5*3.3,8*3,10*2,10*3, etc ... on the drill bits for oilfields. Thermal Stable Polycrystalline Diamond 10*3.5*3.5