We CNC inserts CNC Carbide Inserts are divided into APMT Insert positive-angle inserts and negative-angle inserts. A positive-angle insert means that the insert internal thread Inserts has a back angle, which is a common single-sided insert. Negative angle insert Turning Inserts means that the cemented carbide wear pads insert APKT Insert does not have a carbide turning Inserts back angle and both sides of carbide wear inserts grooving Insert the insert cast iron Inserts can be used.