Model KSM fits 200A Siemens panels that have a single handle horizontal-throw main breaker mounted directly above a 2-pole generator breaker with no space in between. The generator breaker must be mounted directly under the main breaker.
 
All of our generator interlock kits are proudly made in the USA! The interlock is CNC machined from solid T-6-61 aluminum and includes everything necessary to complete the interlock installation including the correct size drill bit, all hardware, thread locking compound, a full warning decal set and clear installation instructions. These are very nice kits.