The Structure of the metal bed frame is more sturdy than others. High quality bed slats guarantee stability and durability,supporting the mattress and preventing it from moving or sinking for long-lasting service life.Three Holes are special design for your demand. They are devoted to making a suitable bed frame with no noise, no shaking and providing a good sleep for you, enjoying your time on this bed frame is this pursuit always. Detail Installation:Tighten the screws to 80% during the primary installation.When the outer structure is finished, you can tighten all the screws.Tools included & 2 people required.