Ensure seamless integration and reliable performance with the Eaton/Cutler Hammer KPRL4FD3 3P Hardware Mounting Kit. This kit is designed for F-Frame breakers and includes a cover for added protection. Available for same-day shipping with a one-year warranty, it's a dependable solution for your electrical power and control needs..The Eaton/Cutler Hammer KPRL4FD3 is a 3-pole, 3-phase hardware mounting kit designed for F-Frame breakers (FD, HFD, ED, EHD). It includes a cover and has a length of 25 inches. The kit is compatible with Type-PRL4 and F-Frame breaker types.