Newmar RailFast Antenna Mounts Similar to 311-N except with lay-down handle that permits easy lay-down. Quick, easy installation of antenna on 1" or 7/8" railing. Ideal for Loran couplers and whip antennas, has direct feed-thru hole for Loran Cable. Ratchet surface permits 360 rotation for adjustment/lay-down. Holds antennas up to 8' in length. No drilling required; all necessary hardware provided