Features Seamless Compatibility: Designed for horizontal mains 150A and 200A load center circuit breaker panels, ensuring reliable installation for indoor or outdoor generators Safeguard Power Sources: Prevents simultaneous activation of utility and generator power, effectively eliminating the risks associated with unexpected power outages Effortless Installation: Comes with a 3/16 steel drill bit for easy mounting on the circuit breaker panel, requiring no additional control boxes or complex wiring Features: 1、Compatibility: Interlocking kit is compatible with horizontal mains 150 or 200amp load center circuit breaker panel boxes. Install indoor or outdoor generators. 2、Work Process: Interlocking kit prevents utility and generator power from turning on at the same time, avoiding the inconvenience that may result from unexpected power outages. Suitable for 1-1/4in spacing between main breaker and generator branch circuit breaker. 3、Easy to Install: The generator interlock kit is supplied with a 3/16 steel drill bit that easily fits through the breaker panel. Easy to install, mounts on the front of the circuit breaker panel, no additional control boxes or wiring required. 4、Aluminum Alloy Material: The interlock plate is made of thick aluminum alloy, beveled and oxidized for resistance and a smooth finish. 5、Safe to Use: Interlock kit is used to safely direct generator power to any circuit in your home while ensuring you have safe access to all household appliances. Specification: Item Type: Generator Interlock Kit Material: Aluminum Alloy, Steel Package List: 2 x Interlocking Plate 3 x Nut 3 x Screw 1 x Drill Bit 2 x Tie 2 x Sticker 1 x Instruction Manual Package List 2 x Interlocking Plate 3 x Nut 3 x Screw 1 x Drill Bit 2 x Tie 2 x Sticker 1 x Instruction Manual