Uses D-rings to mate with firefighter's radio strap. Radio is held securely on a shelf-like bottom by an elastic strap. Wide leather strap lined with Hook and Loop closes around the radio for adjustable closure. Adjusts for most small and mid-size portable radios. Two stretch cords over the top snap to the holder Comes in full leather or nylon webbing material Measurements Interior Width : 2.2" - 4" Interior Depth (Front to Back) : 1.4" - 3" Front Height : 5" Back Height : 5"