What i like to do, if there is not a lot of algae on the bottom, is to use 4 lb test line with a cricket hook using a palomar knot above a medium sized split shot. This keeps the bait off the bottom and causes it to stand out from the line on the hook , about 6 to 10 inches above a split shot. This technique is not a drop shot per se but works well casting and retrieving. Since these critters are usually shallow in the summer. Works well for shellcrackers.Also it doesn't get hung up as bad as a drop shot weight.