... temperature 2.wear resistance 3.high hardness TSP drilling bit inserts from Henan Union Abrasives Corp with super-hard,highest wear ... , 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 ... *2.6,4*4*4*3,6*6*6*4.5,6.2*6.2*6.2*4.3,etc.Cylinders ... :1.5*4,1.8*4,2*4,3*8,4*10 ... applied on the drill bits for oilfields. TSP drilling bit inserts