Spinner Rigs are very effective for using live bait while still covering some water. Fishermen, that like to use live bait, know that it is hard to cover a lot of water while using live bait. Spinner rigs solve that problem. They work well with worms, minnows, small bait fish, and leeches. A spinner rig will include a monofilament snell, a blade and clevise, some beads, and a multiple hook harness. The Snell length can vary depending on the situation. Spinner rigs (also known as crawler harnesses) are very popular for trolling. You can troll for many different types of fish, but most anglers use these rigs to troll for walleye and northern pike.