This 12" fold out ruler also contains ten of the best fishing knots to cover every fishing situation. The easy to read drawings are printed on waterproof plastic cards and are perfect for the tackle box or shirt pocket. Includes the three best knots for terminal tackle connections, the two best leader-to-line knots, the two best line-to-line knots, and the three best loop knots. Whether you're a beginner or a pro, this guide has all you need.