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The basic setup of the Carolina rig with its heavy weight (usually ranging in size from 1/2 to 1 ounce) and soft plastic lure trailing behind on a leader line is ideal for dragging quickly along structure to trigger strikes from bottom-hugging bass.
The three way rig separates the bait from the weight, so that it can move around more enticingly in the current. 2. Carolina Rig. Source: DiscoverCatfishing.com. Bass anglers have long used the Carolina rig because it perfectly presents a bait on the bottom without allowing the fish to feel weight.