TPGH-322 TiN Coated C-6 Carbide Insert USA Made (6025-1322) ~ I.C. is 3/8″. ~ r is 1/32″. ~ S is 1/8″. ~ d is .173″. ~ 11 degree relief angle. ~ TiN coated C-6 for heavy roughing to semi finishing of all steels. ~ Screw on triangle style insert with a chipbreaker. ~ ISO insert # TPGH160308. TiN coated C-6 for heavy roughing to semi finishing of all steels. Screw on triangle style insert with a chipbreaker. 11 degree relief angle. I.C. is 3/8″. S is 1/8″.