1、[Compatible Model] Compatible with for Siemens 100A or for Murray 100A panels. The spacing between main breaker and branch breaker is 1 1/4 inch. Ensure correct model and spacing before purchase. 2、[Easy to Use] Simply slide the locking plate left or right to switch effortlessly between grid power during power outages. This kit is ideal for branch circuits, charging or power sources, control panel equipment, wiring, and portable generators. 3、[Safety Interlock Kit] Avoid the inconvenience of accidental power outages with this kit. Safely direct generator power to any circuit in your home, ensuring a secure connection to your generator while allowing the use of all household appliances. 4、[Aluminum Alloy Material] Made from erosion resistant, high hardness aluminum alloy, the generator interlock plate is reusable and provides excellent insulation and heat resistance for reliable performance. 5、[Easy Installation] Secure the device to the breaker load on the motor chassis following drill points or guiding holes. Installation or removal can be completed in less than a minute using the accessories provided in the generator interlock kit.