One. Are cabinet door leveling tools effective?
Some users reported negative experiences, while others reported positive experiences. After summarizing the feedback, the conclusion is: For cabinets with a height greater than 1.5 meters, installing a pull-tight device is required. For cabinets with a height less than 1.5 meters, or those with special treatments such as metal frame edges, a pull-tight device is not required.
Additionally, straighteners are categorized into standard, self-adhesive, and Wella types. All straighteners require cutting slots; installing straighteners on wardrobe doors is primarily for panel-style furniture, while real wood furniture does not require straighteners.

Two. How to adjust the cabinet door alignment tool.
The forward-facing and reverse-facing nuts are installed at opposite ends of the straightening device body. The straightening device body has recesses on one side for inserting into the door panel.
To achieve optimal straightening results, the straightening tool should not be placed in the center line but rather between 2/3 and 3/4 of the line. For tools with long handles, the metal frame on the edges provides some anti-deformation structure, allowing the tool to be placed at 2/3 of the line. For tools with standard handles or those with integrated straightening tools, the tool should be placed at 3/4 of the line.
How to adjust the cabinet door alignment tool? The alignment tool does not need to be adjusted. As long as it is installed correctly, it can effectively prevent deformation.