Abstract: Seat devices, apparatus, systems and methods for converting vertical single jump seats into bench seats and vice versa, without removing and replacing the seats inside of vehicles, such as in trucks, vans, station wagons, sport utility vans (SUVs), and automobiles. The mechanisms allow for converting the vehicle seats from vertical to bench seats and vice versa without having to physically remove and install different seat arrangements within the vehicles. The conversion between the jump seats with vertical backs and bench seats uses the same seat components and parts. The conversion can take place in seconds and at most a few minutes without using tools.