Ceramic lineup Negative inserts 35° Rhombic Cutting edge preparation Gray cast iron (with scale) Symbol Specification Example Gray cast iron (without scale) Nodular cast iron (with scale) Q P P K B S Chamfered S01525 0.15 mm × 25° and honed Chamfered and honed Nodular cast iron (without scale) T Chamfered T01525 0.15 mm × 25° Heat-resistant alloy S Chamfered Hard materials O N H Turning indexable inserts Dimension (mm) Ceramic Edge preparation type No. of edges PVD - Applicable Insert Description toolholder IC S D1 RE PT600M A66N KT66 A65 VNGA 160404S01525 0.4 N S01525 4 9.525 4.76 3.81 160408S01525 0.8 N VNGA 160404S02025 0.4 N S02025 4 9.525 4.76 3.81 RE 160408S02025 0.8 N D26, D27, D28, D30, D1 IC 35° S VNGA 160404T02025 0.4 N N U D31 160408T02025 T02025 4 9.525 4.76 3.81 0.8 N N U 160412T02025 1.2 N VNMA 160408S01525 S01525 4 9.525 4.76 3.81 0.8 N N : Standard item R : Right hand only L : Left hand only U : Check availability B115