Classic Iron Platform Queen Bed Frame

Brand new!!! Box is open however not removed from the box. Solid Black Metal Platform with Steel Slat Support. I purchased 2 of these from Wayfair and this one is still in box. The 4 corners of the bed have sphere shaped attachments that screw into the bed frame. This bed only has 3 attachments therefore one of the 4 corners would be left without anything screwed into the bed frame.