Bob,
I put them on a 3/4 ounce jig head tied to 3 feet of 20 pound test flourocarbon
leader. Depending on what the fish are doing, vary the retrieve speed and action to make it behave like a big sand eel. They often hit on the drop.
I feel the bigger plastic works best later in the season. Little 5 inch
Bass Assassins work great in the Spring.
Al