Quantum Extra Heavy Duty Standards are produced in accordance with major U.S. manufacturer's standards with regard to steel hardness and wall thickness. Some imported lines may not meet these exact standards.
The Quantum System is compatible with CAPITOL, CROWN, GARCY, and REEVE.
When to use: The QUANTUM SYSTEM is recommended for the most severe loads and where traffic conditions demand a more durable line of hardware. Standards are made with 1" slots, 2" on center for 2" adjustments. .125" steel thickness.