1、COMPATIBLE OBJECTS: The interlock kit is suitable for Eaton and for Cuttler Hammer BR series, CH Series, with plug in neutral 150‑200 amp panels. The spacing between the main generator breaker and the nearest generator breaker is 1 1/4 to 1 7/16in 2、DURABLE ALUMINUM ALLOY: The interlock kit is made of corrosion resistant aluminum alloy and has been anodized on the surface for better thermal and electrical insulation, so you can use electricity safely 3、SAFE TO USE: Generator lock kit safely provide feedback to your home during power outages via portable generators, preventing utility and generator power from turning on at the same time 4、HIGH HARDNESS BITS: Professional interlocking kits offer 3/16in bits, strong aluminum alloy that can easily pass through the circuit breaker panel. Easy to install without additional control boxes or wiring 5、WITH ACCESSORIES: Generator interlock kit equipped with screws, nuts, drill bit, stickers, easy for you to install and use, complete accessories guarantee convenient operation