Shakespeare Stainless Steel Boat Antenna, Ratchet Rail Mount Ratchet action, fast release design for quick and easy laydown. Mounts easily on 78 and 1 vertical and horizontal rails. 932 hole for cable feed-through. Handles antennas up to 8. Heavy-duty construction. Handles antennas up to 8 Standard 1-14 thread male California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Antenna Antenna Type Mounts Product MPN 4188-S Product UPC 71900000000