Door locks

are locks installed on the door panels and door frames of some buildings that need to be opened and closed at ordinary times; they are generally composed of a lock body (including the door and window hardware of the lock tongue, the operating mechanism and the braking mechanism), as well as a lock panel, a handle, a cover plate, etc.

Hinge
also known as hinge, is a connecting piece between the door and the door frame, the window and the window frame, which can make the door and window rotate freely and open and close; the hinge is connected by a blade and a pin, and the hinge varieties include ordinary hinges, spring hinges and flip window hinges.

Door closers
are a kind of device that can automatically close or fix the opened door leaf in a certain position. Some of them also have the function of hinges, and some have fireproof properties; the main varieties include floor springs, door top springs, door slingshots, door stoppers, door clamps, magnetic door suction heads, etc.

The handle
is generally installed in the middle of the edge of the window leaf, and some are also designed to be connected to the door and window hardware with a bolt; it is mostly stamped and formed with materials such as brass, low carbon steel, zinc alloy, stainless steel, etc., and the surface is plated with nickel, chrome or zinc.

The support
is usually installed at the lower edge of the window sash, and some are designed to be used with hinges. They are mostly stamped from brass, low-carbon steel, zinc alloy, stainless steel and other materials, and are plated with nickel, chromium or zinc.