When choosing the correct slide for your application you will need to consider the types of features you need
A slide with a disconnect feature is extremely useful. It allows the drawer member to be separated from the rest of the slide.
This has benefits both for the assembly of the application and also for the end user. First, it means that you can take the drawer member and mount it to the moving part of the application – such
as a drawer, possibly in a separate part of the manufacturer’s facility.
The remainder of the slide, commonly the cabinet and intermediate member, can be fixed into the cabinet. It is then a simple matter of bringing the two parts of the application back together and assembling the moving element into the cabinet, making the slide fitting and installation very easy.
Secondly, while in use, the drawer / moving element can be easily removed for maintenance, cleaning or replacement, etc. and then reinserted.
Lever: Release an internal lever and pull the drawer outward and away from the cabinet
Push Latch: Press the latch up or down (the slides are unhanded) to release
To reconnect the parts watch this video. It is important that the ball retainer is pulled forward when re-inserting the inner member. Push firmly until the two parts and fully engaged and open and close a few times.