all the screws and tools are already in the box. Mostly, it can be assembled within 15 minutes. Features: ?Adjustable Ergonomic Mesh Office Chair? Both multifunctional adjustment and ergonomics are the features for this computer office desk chair. Seat height,headrest and lumbar support are all adjusted up and down for your comfort. Meanwhile, combines ergonomic design, you can work on this executive office chair for hours a day with no fatigues. ?Thicken Memory Sponge Seat Cushion? We use high elastic mesh and high resilience memory sponge for the seat. As we know, the comfort experience is so important for sitting hours. This mesh office chair are high breathable and super comfortable, even you sit for a long time, it still can be kept as it is,and can?t be changed. ?Mesh High Back Design and adjustment 90-135? This computer office chair back can be adjusted from 90 to 135 for your comfort, you can lock in any angle you want. Meanwhile 360 swivel wheels can be moved freely, the high back and headrest are both made of mesh, it?s super breathable and giving you high resilience support. ?Super Easy to Assemble? There is a clear assembly manual in the package, you can follow it step by step very easily. And no more extra tools needed, all the screws and tools are already in the box. Mostly, it can be assembled within 15 minutes. ?Ergonomic Office Chair with Foot Rest?The new chair with footrest can be used in a variety of scenarios, reclining or sitting cross-legged to accommodate your different sitting positions. Package Includes: 1 x Office Chair With Wheela Listing and template services provided by inkFrog