Message the seller :
one bolt is missing on each side of the lid. these bolts are to secure the lid while opening and closing. However these missing bolts don't hamper usage. you could acquire small bolts from home depot or something if there is concern. in one of the pics you can see a wooden tong stuck in on each side. that's how we have been securing the lid. Was never enough of a concern for us to get new proper bolts.