The ZN3-77-11B detachable UHF CB Radio antenna offers a good balance between size and gain which is well suited for either hilly or flat country. The detachable design allows for removal of the antenna when damage or vandalism may occur or when not in use. Removal is as easy as releasing the tension grub screw and unscrewing the antenna top. Ensure to install the PVC cap on the exposed spring base connector to stop dirt/water ingression.