This Generator Interlock kit fits Eaton PRL1 modular breaker panels and accomodates the raised branch breaker columns. The two-pole generator breaker must be mounted at the top of the left column of branch breakers.
 
This is a very high quality kit and includes a precision CNC-machined interlock assembly, all necessary hardware, a complete placard decal set, and  the correct size drill bit for making the 4 required holes for mounting the interlock.