How much clearance should be reserved for the installation of concealed slide rail

After the drawer is opened, the slide rail head fixed on the drawer is provided with a wrench (on both sides). Press the wrench with both hands and pull the drawer outward to remove the drawer. Then you can remove the fixing screws on the slide rail respectively. It is easy to install the slide rail. The key is to press the wrench before installing the drawer on the slide rail.