The Kenko 1.5x has one special attribute: it will fit on Nikon mount lenses that cannot accept the Nikon teleconverters including shorter prime and zoom lenses, older non AF-S lenses, etc.
We cannot guarantee it will autofocus with every lens-camera combination possible, in fact it won’t with most zoom lenses and with cameras lower than the D300. But it does allow you to use a teleconverter with lenses that otherwise won’t accept them, in case that’s something you really want to do.