Correctly handing an opening or an item of hardware is one of the most important skills you need to acquire when you work in the door and hardware industry. Many items of hardware have to be handed correctly when ordered from the manufacturer. For example, some models of mortise locks, door closers

The lock cylinder is an important part of the lock, and it is the main part that controls the unlocking of the lock. The lock core and the key can rotate and drive the core of the lock bolt. The main function of the lock cylinder is to twist the square tongue of the mortise lock, starting the inclin

American National Standard Institute (ANSI) ANSI 156.5 ItemANSI 156.5 Latch Bolt Cycle-testGrade 1-500,000Grade 2-300,000Grade 3-200,000 Deadbolt Cycle-testGrade 1-250,000Grade 2-150,000Grade 3-100,000Fire TestPass UL 10 C 3 hours fire testAnti-corrosionSalt Spray Test 200 hours 1. SCOPE 1.1 ANS