... .high temperature 2.wear resistance 3.high hardness TSP drilling bit inserts from Henan Union Abrasives Corp with super-hard,highest ... *4.3,etc.Cylinders:1.5*4,1.8*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. Application: Different TSP products ... be applied on the drill bits for oilfields. TSP drilling bit inserts