I called and a girl familiar with the Marco Island headboard and was aware there were no bolts supplied to fit the board onto the base whoever the bed was drilled with female metal inserts to accept the bolts. "But, what size", I asked so I could go back to Home Depot to buy bolts. Go back to Home Depot and tell them 4-5/16, 4" long. So, I was satisfied. User's recommendation: Beware of bolt size needed to attach to frame.