Cal-Royal CAL-ROYAL ES1433 Grade 1 Universal Electric Strike is a versatile electric strike designed to accommodate cylindrical locksets with up to 3/4" (19mm) latch throw. Its fail-safe or fail-secure configuration options make it suitable for various applications. With a static strength of 1500 lbs (680Kg) and dynamic strength of 70 ft-lbs, it ensures reliable operation. Its durability is evident in its endurance rating of 250,000 cycles (UL tested) and 1,000,000 cycles (factory tested).