This brilliant Rail-Mounted Cobalt Blue Crackle Glass Birdbath will add a pop of color and support your local wildlife, even if you dont have a garden. The hand-blown glass bowl is held safely in a metal cradle that has a threaded base. The cradle base then attaches to the handrail bracket. Ideal for porches, balconies or deck rails, the wrought iron bracket has C-type clamp that holds the bracket to the railing without need for drilling or permanent mounting.