These devices are lugs that accept larger wire sizes than the normal neutral bar accepts in QO and HOM load centers. They are for installing onto the neutral bars. Some of the kits are ``fork`` mounted, which means that the lug has two prongs that are inserted into two neutral bar holes, and are held down by two wire binding screws. Others are ``straddle`` mounted, which means that the lug mounts on the top of and sit directly onto the neutral bar.
