Learn to Fish series – the overhand knot. The Loop Knot. Essential fishing knot for fishing live bait rigs, making float rigs and fishing live bait. I use this overhand loop knot in my fishing leaders. This knot connects my hook line to my main fishing line. The Learn to Fish series is a set of videos and educational materials from Chicago Fishing School.com to help you catch more fish and learn to fish the right way! Fishing knots, fishing rigs and great fishing tips can be found at our website along with online fishing tutorials.