1. The structure is different. The two-section drawer slide rail is composed of two sections: outer rail and inner rail. The three-section drawer slide rail is composed of three sections: outer rail, middle rail and inner rail.

2. Different widths. The width of two-section drawer slide rails is generally 17mm, 27 mm or 35mm; the width of three-section drawer slide rails is generally 45mm.

3. The itinerary is different. The two-section drawer slide rail can pull out about 3/4 of the drawer, while the three-section slide rail can pull out the entire drawer.

4. The use effect is different. Because the three-section slide rail can fully pull out the drawer, it is more convenient to use than the two-section slide rail.

Extended information:

Types of slide rails:

1. Powder-sprayed slide rails. As the first generation of silent drawer slides, the roller slide has a relatively simple structure, consisting of one pulley and two rails. It can cope with daily pushing and pulling needs, but it has poor bearing capacity and does not have buffering and rebound functions. It is commonly used with Computer keyboard drawer, light drawer. ?

2. Steel ball slide rail. Steel ball slide rails are basically two- or three-section metal slide rails. The most common structure is installed on the side of the drawer. It is relatively simple to install and saves space. Good-quality steel ball slides can ensure smooth push-pull and large load-bearing capacity. Such slides can have buffer closing or push-rebound opening functions.

3. Hidden slide rail. It belongs to mid-to-high-end slide rails. It uses a gear structure to make the slide rails very smooth and synchronous. This type of slide rails also has the function of buffering closing or pressing and rebounding. It is mostly used in mid-to-high-end furniture and is not as popular as steel ball slide rails. This kind of slide rail is the future trend.

4. Damping slide rail. The drawer will use hydraulic pressure to slow down the speed when closing to the final distance, reducing the impact force and creating a comfortable closing effect. Even if you push the drawer with force, it will close gently, ensuring perfect and quiet movement. Commonly used for push-pull activities of drawers.

Baidu Encyclopedia-Sliding Rail