Pro Trucker Stainless Steel Extra Heavy Duty 3/8-24 Standard Thread Stud Mount for Ham & CB Radio Antennas Super Strong Pure Stainless Steel Oversize Mounting Stud Fits All antennas using the regular 3/8-24 bolt-in thread. Accepts any Optional cable with PL-259 Connector Wrench Key included for tightening, Heaveiest Duty stud mount. Install in most mount/brackets, or flat surface hole. Overloaded Mobile is an authorized re-seller of all Pro Trucker products