I. Appearance

A barrel bolt is usually a cylindrical metal rod with one or two fixing seats. Its appearance is relatively simple and is usually used on light doors or windows.Heading

 

II. Installation location
A barrel bolt can be installed on the edge, top, or bottom of a door or window. The specific installation location depends on the type and usage needs of the door or window.
A flush bolt is usually installed at the bottom of a door or window, flush with the ground. It is usually used for doors or windows that need to be installed flush with the ground, such as glass doors, sliding doors, etc.

III. Usage method
A barrel bolt is usually locked or unlocked manually by operating it. Users need to insert or pull out the bolt rod from the fixing seat to achieve the locking or unlocking function.
A flush bolt is usually locked or unlocked automatically or manually for doors or windows. In automatic operation mode, the flush bolt will be locked automatically when the door or window is closed. Users can unlock it by pressing a button or using a key. In manual operation mode, users need to insert or pull out the bolt rod from the fixing seat to achieve the locking or unlocking function.

IV. Applicable scenarios
Barrel bolts are suitable for various types of doors or windows, especially light doors or windows. Its installation is simple and the price is cheap. It is a relatively common door or Window Lock.
Flush bolts are suitable for doors or windows that need to be installed flush with the ground, such as glass doors, sliding doors, etc. Its concealed appearance and convenient use make it a relatively high-end door or window lock.

In conclusion, barrel bolts and flush bolts are different in appearance, installation 
location, usage method, and applicable scenarios. When users choose door or window locks, 
they should choose the appropriate lock according to their own needs and the type of door 
or window.