●【Product Compatibility】The generator breaker interlock kit is compatible with Square D QO or Home line with a single horizontal throw 100 or 125 amp panels. 3/4 - 7/8 Inch Spacing between main and generator breaker. Make sure the model number and spacing is correct before purchasing. ●【High Quality】The generator interlock kit is made of aluminum alloy, the surface is anodized for better corrosion resistance, electrical insulation and heat insulation. ●【Safe & Reliable】Our Generator Interlock Kit prevents utility and generator supplies from being on at the same time. It is truly a great way to safely connect up a generator while assuring that you have access to all of your home electrical appliances. ●【Package Included】 The Generator Interlock kit includes 1 Interlock plate, 3 Shoulder Screws, 3 Hex Nuts, 5 Remind Label, 2 Zip Ties, 1 Instruction Bulletin, 1 Drill Bit. ●【No Worries】Our Generator Interlock kit come with a lifetime warranty. Write to us If you have any questions about the product, well give you a new original replacement free of charge.