Come with 3 racks, 3 Screw (one kit) to hold one laptop - No laptop included. Screws Mounting - Contains 3 short stainless steel screws, Fits any device with a maximum thickness of 1.8 inches (50MM). There are no real restrictions on the length and height of the device. Install under shelves, desks, cabinets, etc. Hold up to 1.8 inches (50MM) thick laptops, tablets, keyboards, Routers, Modems, Cable Box, Network Switch & More. Keep your desk organized and neat. Mounted these on the bottom of a sit/stand desk to free some desk real estate up.