With its patented, integrated razor blade, the SharkTooth Line Management System is an innovative tool no angler should be without. Keep all your line spools organized and accessible without tangles or loose ends. Quick and easy to place on spools and cut the exact length of line you need. Available in 3 sizes to fit most spools. 3 line cutters per pack. Sizes, Small fits spools 1 3/4" to 3 1/2" Medium fits spools 2 1/2" to 4 1/2" Large fits spools 3" to 6"