Cermet / coated carbide / carbide lineup Negative inserts 90° Square Free-cutting steel P Carbon steel / Alloy steel Stainless steel M B IC Gray cast iron NQS K Nodular cast iron OQT RE Non-ferrous metals N S Heat-resistant alloy Turning indexable inserts S Titanium alloy Hard materials H Applicable chipbreaker range Dimension (mm) Carbide No. of edges CVD Applicable Insert Description toolholder IC S RE CA310 CA315 CA320 Without Chipbreaker SNMN 120408 0.8 N N N D41, D42, D43, 8 12.7 4.76 D49, D50 120412 1.2 NNN Cast iron N : Standard item R : Right hand only L : Left hand only U : Check availability B37