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There are 3 rails that get screwed in, then there’s a middle bar that is screwed to the 3 rails, one of the drilled holes are too big! Then the other support rails about 8 go in these slots, but they don’t lay flush, the pop up, so I taped them down. And lastly, the bed keeps sliding to the headboard so you can easily hit your knee/shin on the bottom of the bed because the bed scooted up. Will prob put fabric tape to try and hold the bed from moving. Overall, I’ll keep it because it’s heavy and bulky and I can’t fit it in my car to return.