FX 4.1 No. 20-M1 Grade CTP1340 Insert: Insert Size: Material: Carbide Inscribed Circle (Decimal Inch) 0. Thickness (Decimal Inch) 0. Corner Radius (Decimal Inch) 0. Coating: Chip breaker Rake Positive Relief Angle (Degree) 0 Included Angle (Degree) Maximum Depth of Cut (Decimal Inch) 0. Shape Diamond