Features: his generator interlock kit avoids the inconvenience that can be causes by unexpected power outages. It is used to direct generators power to any circuit in your home safely. This is really a great way to safely connect your generator while making sure you have access to all of your household appliances. This Generator interlock kit is suitable for Square and 100/125amp Panel. 3/4inch spacings between main and generator breakers. The generator interlock kit contain 1x Interlock Plate, 3xHex Nut, 3xShoulder Screws, 1xGenerator Starting-Up Procedure Label, 5xRemind Label, 2xZip Tie, 1xInstruction Bulletins, 1xDrill Bit. The generator interlock kit provide a 3/16 drill bit, steel that pass easily through the breakers panel. Simple install, no additional control box/wiring required. Specifications: Material: metal Package Includes: 1 set Generator Interlock note: Please allow 1 to 3cm error due to manual measurement, please make sure you not mind before your bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.