Cutter Is Turned Milled And Ground From A Solid Piece Of Tungsten Carbide And Provide The Greatest Durability When Used Under Stress Load Conditions.Offers Better Plunge Cutting Characteristics Than Tct.Many More Re-Sharpenings Can Be Obtained From Stc Tools.A Harder Grade Of Carbide Is Used As The Tool Is Not Brazed.Two Flute - Finer Finish.PTDTREDIRS381X12STC