The bolt is a kind of anti-theft component to prevent the doors and windows from being opened from the outside.

The lock body of American type inserted core lock is more stable than that of ordinary inserted core lock. It is more durable than ordinary door lock and simpler in structure. Its service life reaches 800000 times. It is durable, and its internal parts are still undamaged. The pinball of lock head has double differences in angle and length.

As a professional lock cylinders manufacturer in China, we provide customers various exterior and interior Mortise lock. Our door locks are high-quality, durable, anti-rust and textured. The lock cylinders we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

The significance of the door closer is not only to close the door automatically, but also to protect the door frame and the door body (stable closing). More importantly, the door closer has become an important executive part of the intelligent management of modern buildings. Door closers are mainly used in commercial and public buildings, but they are also used at home. They have many uses, the most important of which is to make the door close by itself to limit the spread of fire and ventilation in the building.

The panic exit device is also called fire escape lock. It is mainly used in the emergency exit doors of large supermarkets, shopping malls, office buildings, hospitals, schools, factory buildings and other public places with large flow. It has the function of preventing outsiders from entering the interior without permission and achieving the safe escape of insiders in case of fire and other emergencies.

The American National Standard Institute (ANSI) is a non-profit non-governmental standardization organization in the United States. It is the coordination center of voluntary standards system. It was founded in 1918 and headquartered in New York. There are more than 250 professional societies, associations, consumer organizations and more than 1000 companies (including foreign companies) participating. Representatives of federal government agencies participate in their activities on their own behalf, and do not receive government funding.

1.S1.1 This Standard establishes requirements for lightweight, standard weight, heavy weight and detention hinges. Cycle tests, lateral and vertical wear tests, friction tests, strength tests, finish tests.

American National Standard Institute (ANSI) ANSI 156.1 This Standard establishes requirements for butts and hinges. Cycle tests, lateral and vertical wear tests, friction tests, strength tests, finish tests, and material and dimensional requirements are included.