The CFL and TFL series mounts have a bracket that is intended to be screwed in to the floor or axle tunnel. The only difference in the model numbers is the adjustability features of the upper part of the mounts. Also, the CFL's are more or less for smaller pickups and cars, while the TFL's are for larger trucks, buses and like vehicles. These series' are a sturdy mounting option and can be adapted to any vehicle. The mount can easily be quickly removed from the screwed down bracket to take the mount out of the vehicle anhy time, but the actual bracket can only be removed by unscrewing it from the floor. This is a great option for someone who intends to have a more permanent laptop mount in their vehicle. Ideal for fleet vehicles, contractors and businessmen.