These baits vary from style and depth. There are 1minus to 30 plus crank baits. What this means is that the 1 minus will go no less than twelve inches deep and the 30 plus will go 30 feet deep. There are different types of bills on each crank bait. The bill configuration can cause the bait to have more side to side motion.
Long bills make a wider wobble and shorter bills make a tighter wobble.
The 30 plus will wear you out on the retrieve because of it's large bill. You may have to invest in a glass cranking rod if you get into crank bait fishing. This rod and a fast retrieve reel will help to keep from wearing you out. I have caught many summer time fish suspended over deep humps with this bait. The Storm wiggle wart in the magnum series is a great summer time bait in the creeks and over deep humps.