® Thread Turning Toolholders Quick Change Polygon Threading Toolholders Polygon shank ISO standard (26623) compliant for toolholding systems Polygon taper ensures automatic radial centering and even pressure around the coupling Enable quick tool changes ISO standard coupling system with a 1.4 degree tapered polygon shank design Interchangeable with leading manufacturers External Toolholders Internal Coolant Bore D F L Equivalentto... Ordering Code D F L Insert Anvil Torx RH LHScrewScrewkeyAnvilAnvil C4 P40-SER 27050-16 16 40 27 50 S16 A16 K16 AE16 AI16 C5 P50-SER 35060-16 16 50 35 60 S16 A16 K16 AE16 AI16 C6 P63-SER 45065-16 16 63 45 65 S16 A16 K16 AE16 AI16 C4 P40-SER 27050-22 22 40 27 50 S22 A22 K22 AE22 AI22 C5 P50-SER 35060-22 22 50 35 60 S22 A22 K22 AE22 AI22 C6 P63-SER 45065-22 22 63 45 65 S22 A22 K22 AE22 AI22 C8 P80-SER 55080-16 16 80 55 80 S16 A16 K16 AE16 AI16 C8 P80-SER 55080-22 22 80 55 80 S22 A22 K22 AE22 AI22 C6 P63-SER 45065-27 27 63 45 65 S27 A27 K27 AE27 AI22 For LEFT HAND toolholders specify SEL instead of SER A02-17