Adjustable leg extensions are devices used to modify the length of furniture legs, allowing for height adjustments. They are commonly found in items like tables and chairs, enabling users to customize their seating or working height for comfort and ergonomics. These extensions typically feature a simple mechanism, such as a screw or latch, that allows for easy adjustment. This functionality is particularly useful in settings where multiple users of varying heights need to use the same furniture, ensuring that everyone can achieve a comfortable position.