52817 T-231 2-1/2″ Heavy Duty C Cutter Drain Cleaner Tools for Ridgid c-4, c-6, c-7, c-8, c-9 Sectional Cables, Compatible with K-40 K-45 K-50 K-3800 Drain Cleaning Machines. 【Application】 This c-cutter is compatible with Ridgid K-40 K-45 Sink Machines, K-50 Sectional Machines, K-3800 Drum Machines.