Where indicated below, our ornaments can be used with a ferrule or spindle. A ferrule is generally used for indoor/parade use on wood poles and a spindle is generally used for outdoor use on in-ground or wall-mounted flagpoles. When using an ornament for an indoor/parade aluminum pole with a top adapter already installed, a ferrule or spindle is not required. The only exception to the above is the Elks Head ornament, which is supplied with a threaded rod attached to the bottom of the ornament. A special ferrule is supplied for use with our wood indoor/parade poles. Please specify if you require this special ferrule.