Hey, we LOVE to help people spend money!
The locks are no big deal. Measure your valve stem diameter, then look at the groove in the valve. There are two types of locks, one for a square-cut stem, the other for a round-cut stem (bead locks). Most likely you will have square locks.
You also need to know if your locks are -.050, standard, or +.050. Look at your lock and see where the tang is. If it is pretty much centered top to bottom, it is a standard lock. If it is moved closer to one end or the other, then it is a -.050 or a +.050 lock.
Take a close-up picture and post it here.
If you use their retainers then you also need to know their angle. I can't tell you how to measure that. I always buy locks and retainers together so I know they will work together. I have been using 10* stuff.