If you need extra support for your antenna, this extra heavy duty chrome stud is what you are looking for. Whether you are an off-road maniac, a heavy equipment operator, or just a guy with a truck that wants to be ready for that low-hanging branch, this stud will stand up to the test. The top portion of the stud is a solid chunk of high quality stainless steel, threaded to receive any 3/8 x 24 antenna or accessory, including Firestik, Wilson, Francis, and more. Below this is a tough nylon washer that isolates the antenna from ground. The lower half of the stud is another solid piece of steel that provides a reliable ground for the coax. Finally, at the core of the stud is a 1/4" thick steel bolt that holds everything together. When put together, this thing is nearly indestructible., When assembled, the stud is 2" tall and 1 1/8" in diameter. It is installed with an included wrench. It will install safely on surfaces up to 3/16" thick through a 1/2" hole. The coax connection is an SO239. It will accept any CB coax with the big PL259 connector on it., Features, Chrome, Extra heavy duty, SO239 coax connection, Compatible with 3/8 x 24 threaded antennas, 2" tall x 1 1/8" wide, Requires 1/2" hole