A scanning bar hook for displaying packeted items in a shop, has upper and lower limbs with a crossbar extending from the upper limb. A moulded plastic assembly pivoted on the crossbar has a display flap for mounting a bar code card, a fin extending from the flap toward the first item and an arrester arm which is insertable between the foremost item and the next item. When the foremost item is advanced for removal it strikes the fin and blocks the removal of all the remaining items.
