The RAM Mount Adjustable Knob Kit RAM-234-AK1U is a high-quality laptop tray accessory designed by RAM Mount in the United States. This black knob kit is compatible with RAM Tough-Tray products and comes with a lifetime manufacturer warranty, ensuring durability and long-lasting use. Perfect for securely attaching laptops or other devices in vehicles or on-the-go, this adjustable knob kit provides flexibility and ease of use for various mounting needs.