The Chrome Air Window and Door Lock Control Face Nut is a practical and reliable solution for controlling your air windows and door locks. Designed to fit most 2004 and older Peterbilt and Kenworth makes and models, this chrome control face nut is sold individually. Its air window and door lock control application ensures convenience and ease of use. With its durable construction and compatibility with various truck models, this product is a must-have for any truck owner looking for a reliable and efficient solution.