Barn Door Latch

I was searching everywhere for a BLACK stall door latch. I knew they existed but had a really hard time finding one so I was pleased that this item was available here. It seems well constructed, good smooth finish. However, either the picture is incorrect or my order was missing a piece, because I received no locking button as shown. It didn't matter in this instance since I bought it for a garage door, but if it were for an actual horse's stall, I would be displeased since I have Houdini horses that know how to open latches and they need to be 'locked' at the bottom.