4190 Rail MountRatchet action designed for quick and easy installation on 7/8 and 1 in. vertical or horizontal rails. Handles antennas up to 8 ft Special cable slot eliminates removal of most factory-installed connectors Standard 1in.-14 thread (male) Construction: Stainless steel Mount type: Rail Cable pass through: Special Cable Slot Product : SHAKESPEARE 4190 STAINLESS STEEL RAIL MOUNT Manufacturer : SHAKESPEARE MOUNT Manufacturer Part No : 4190 UPC : 719441110253