Trusted by industry-leading drive thru restaurants, the Ready Access 275 Self-Closing drive thru slider window is the perfect choice for all drive thru applications. Featuring an abundance of rugged features specifically designed to meet the demands of the hardest working professionals in the food and service industry. These windows have an adjustable self-closing track inside of the header, a thumb turn lock and built in night security lock bar, and a weather resistant sloped sill. The optional presence sensor can hold open the window hands-free, then close automatically when the attendant steps away.