Allows you to position the joystick grip (in central position) at 15 degrees or 30 degrees for improved immersion and comfort Extends the height of the joystick grip by two inches or 5cm for enhanced realism Included ring (similar to the ring on the joystick grip) allows for easy and sturdy assembly without making any adjustment to the joystick base Precisely machined metal construction and unique design make this adapter suitable for current and future Thrustmaster joystick grips (sold separately) Works for Thrustmaster AVA joystick base Compatible with the following Thrustmaster joystick grips: Viper HOTAS add-on and F/A-18C Hornet HOTAS add-on grip