Consists of a plastic body featuring an inner spring that moves the zinc-alloy pin out. Shelf is diagonally inserted into the cabinet, by levelling it, the pins find the side holes. Removal of the shelf is carried out with blade screwdriver, by simply pulling and clicking back the pins (juston one side of the shelf). Before repositioning the shelf, release the locked pins. Intentional leway of the pin to easily slot into position, even if off line from the hole.