These are a low profile light weight mounting bracket that add approx 1/2" length to the length of the actuator when installed. They fit on either end of the actuator and are chrome plated steel. The brackets when installed are free to rotate almost 180 degrees, which gives you the most flexibility for your application. Please note that they only fit the FA-MS (Mini Actuator). Each set comes with 2 brackets and 2 cross pins.