All RaceQuip Window Net Mount Kits are made from high quality steel then zinc plated for a durable finish. RaceQuip offers four different styles of kits to meet your needs. Kits include all necessary hardware to secure the top and bottom of one window net to a racecar chassis. This kit includes a 30" round bar for the top and a 35" flat bar for the bottom. The top bar has a GM seat belt style push button buckle system to use as a quick release when mounted to the racecar chassis. Both the top and bottom bars are held in place by the included tabs that are welded to the chassis.