Tie Rod Kit, Outer Only—contains one tie rod which attaches to the steering knuckle
Tie Rod End Kit, Left, Inner and Outer—contains both tie rod end and shaft that connects to the steering rack as well as the outer tie rod end; also contains a boot and the required hardware for the left (passenger) side
Tie Rod End Kit, Right, Inner and Outer—contains both tie rod end and shaft that connects to the steering rack as well as the outer tie rod end, also contains a boot and required hardware for the right (driver’s) side