Locking device for releasably locking a withdrawable furniture part

An arrangement comprising at least one drawer pull-out guide and at least one locking device for releasably locking a furniture part, in particular an extendable work surface, extendably-supported on a furniture carcass in at least one position relative to the furniture carcass, the drawer pull-out guide including a carcass rail configured to be fixed to a furniture carcass and at least one extension rail, the extension rail being displaceably supported relative to the carcass rail between a fully closed position and a fully open position, wherein the locking device includes a first locking component configured to be fixed to the furniture carcass, and at least one second locking component configured to be fixed to the extendably-supported furniture part, the first locking component and the second locking component being configured to be releasably locked to one another, wherein at least the second locking component includes a base member and a locking element for releasably locking the first locking component, the locking element being pivotally supported about a pivoting axis on the base member, and the extension rail of the drawer pull-out guide can be releasably locked by the locking device in the fully open position or in a position immediately before reaching the fully open position.