Anti-Scratch & Anti-Slippery: The desk laptop stand holder is covered with non-slip silicone pads inside the slot, perfectly protecting your PC and tablets from scratches. The bottom silicone pads ensure your device remains in place and never slides off the stand. Sturdy & Stable: The vertical laptop stand for desk is made of premium aluminum alloy, ensuring great stability for holding your laptop. The base is also covered with silicone pads to avoid slipping or sliding. Broad Compatibility: This stand for laptop is compatible with MacBook Air, MacBook Pro, Microsoft surface, Samsung Galaxy Book, Lenovo Ideapad 3, HP Notebook, Dell Chromebook, ThinkPad and other computers up to 17.3 inches. Adjustable Slot: The laptop holder stand can loosen the base screws to simply adjust the gap and tension to fit any laptop with the thickness between 0.47" and maximum 1". The slot is easily extensible by twisting the screw, even no tools needed. Dual Slot Design: UGREEN vertical laptop stand holds your laptop when it is connecting to the monitor or simply for storage. With updated dock version, this double laptop stand holds two laptops simultaneously in an upright position to optimize and organize your desktop space.