This Extra Heavy Duty Ratchet Mount was originally developed to accommodate the big Galaxy antennas. The extra strength of the stainless steel will be welcome in many other applications. Extra Heavy Duty construction Four-way ratchet design with handle For deck or bulkhead mounting Has 15/32'' hole for Loran cable Standard 1''-14 thread male threads The base is 2-1/2" Width x 3-5/8" Length The center to center distance of the holes is: 3" in length and 2" in wide