Overhead Door Corporation’s Knock & Lock™ Breakaway Door System is the industry’s only self-resetting, impact-resistant dock door available. The rugged Knock & Lock™ is designed for higher productivity, energy efficiency and costs 35% less than a complete breakaway door, making it the ideal choice for any dock environment. In addition, the Knock & Lock™ Breakaway Door System offers a rugged, puncture-proof interior skin with a steel exterior for years of trouble-free service. Every panel is polystyrene insulated to 2 inches, providing an R-value of 8.56, and has dual slide locks on the bottom section for security. Every Knock & Lock™ Breakaway Door System is backed by an industry leading 10 year limited warranty. Whether the application requires a breakaway door system or simply breakaway sections for retrofit applications, the Knock & Lock™ Breakaway Door System is the perfect solution for facility managers and architects alike.