Can make FG knot with this plier!Improved the rock function for safety!Can make knotting, tightening, and cutting of FG knot with only this product.Easy to cut even PE line.Can measure the size of fish caught with the measurement marker using the free Hapyson measurement application.Compatible Line :PE Line-0.3 (3lb) ~ 6 (60lb);Leader-3lb (No. 0.8) ~ 80lb (No. 22).Max. Measurement Size : Up to 50cm