Sandvik Coromant T-Max P Carbide Turning Insert, TNMG, Triangle, QM Chipbreaker, GC235 Grade, Multi-Layer Coating, TNMG 221-QM, 1/4" iC, 0.0157" Corner Radius (Pack of 10) Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems Inserts turning, T-Max P double-sided with Chipbr, / -QM, all shapes Negative basic shape Indexable-turning external and internal