So-called "cage creeping" can occur with all types of ball bearings. It refers to a situation where the balls that the movable rails rest on no longer roll but skid for the first millimetres of an extension, which causes the endstop to move. As a result, the pull-out rail of the table can no longer be fully extended. In order to be able to completely extend the table again, move the base for roughly the last 20 cm up to the endstop with a short but firm push. Please note: First make sure that no other object is blocking the pull-out.