Elfa Locking Clip for wall rail brackets. This clip is made specifically to stop the Elfa wall rail brackets for the drying rack from sliding up and out of their slots when the drying shelf is moved to its stowed position.

Should also work with other brackets in the Elfa wall rack/rail range to stop them from moving out of position.

The clip has a compliant mechanism and a simple pinching of the protruding part will release the clip from the wall rail.