Easy disassembly design, convenient and practical. Metal hinges with support structure are securely installed to ensure the stability of the lid. Thickened alloy anti-collision angle, strong and stable, anti-collision and anti-fall, effectively protect the box. All aluminum alloy pull rod; strong compression resistance, stable structure, suitable for of different heights. Removable mute universal wheel, wear-resistant edge, smooth travel with makeup. Office items can also be stored inside, keeping the desktop tidy