The steps for changing the direction of the lock tongue of the lock body may vary slightly depending on the type of lock body, but they can usually be done as follows:

1. Common lock bodies:

Moving the lock tongue to the outermost side can change the door lock to the right switch. ‌

Moving the lock tongue to the innermost side can change the door lock to the left switch.

Moving the lock tongue to the middle position can open and close the door lock to the right or left, thereby flexibly changing the direction of the door lock.

2. Special lock bodies:

For some lock bodies, you may need to find the paddle opening behind the lock tongue first, push it out with a tool, and then rotate it to adjust the direction. ‌

3. Other lock bodies may require the removal of the guide plate, and then the bevel tongue is removed for direction adjustment before reinstalling. ‌

For lock tongues with fixing screws, you may need to remove the screws first, adjust the direction of the bevel tongue, and then re-fix it. ‌

4. Smart door locks:

Adjusting the lock tongue of a smart door lock may involve more complex steps, such as using special tools or removing specific parts. It is recommended to refer to the user manual of the specific product or contact a professional installer.

When adjusting the direction of the lock tongue, be sure to pay attention to the following points:

Make sure to operate correctly to avoid damaging the lock body or affecting the normal use of the lock.

For unfamiliar lock types, it is best to consult relevant information or consult a professional first.

After the adjustment is completed, be sure to test the function of the lock to ensure that everything is working properly.

Please note that the above steps may vary depending on the brand and model of the lock body.