External Holders Screw Lock SystemDouble Lock (D) Type Mini HolderSTypeD External Tool Holder Series PSC Polygon - Shank Holder - Produced According to ISO 26623-1 Negative Insert Type TOOLING SELECTION Application General Turning &Facing General Turning & Copying General Turning Insert TypeSystem S80C° LDiCamond Type 55° Diamond TypeSDJC T-REX55° 90° Square TypeSSBC SCLC SDJC SSBC a D43 SDHaCD43 a D43 SRSCR DCLN DSDDHJaCND43 DCLN a D41 DDDDHJaNND41 DSBN DDHN DSBN a D41 a D41 Classification System for Polygon - Shank Holder PSC 40 - S C L C R 27 050 - 09 PolygonShank ClampingSize (ØD)System HolderStyle Feed DirectionR: Right HandSize (f)HolderLength (L1)Insert CuttingEdge Length D: Double Clamp L: Left Hand S: Screw Clamp N: Neutral Insert Seat Clearance Shape Angle N = 0° C = 7° P = 11° D6