The Model 3200, our SINGLE-BRACE FLOOR MOUNT , secures to the floor of the vehicle using #10 self tapping screws. When you travel in off road or extremely rough conditions, the BRACE LEG adds stability and safety. When leaving your laptop screen open, while driving, we suggest the ACCESSORY SCREEN HOLDER to prevent laptop hinge or screen damage. The patented CableDock securing system is featured for securing the laptop computer to the desk. Height is adjustable from 25" to 30" standard and 25" to 33 1/2" with optional height extender rod. This laptop desk is easily removed in seconds, when not needed.