If you fish tournaments you need one of these kits.  The Ardent SmartCull Professional Culling System is a two-stage system that allows you to cull by color and weight. A series of six highly buoyant, impact-resistant balls eliminates the need for markers, charts or computers. The easy-to-read numbers record up to 15 pounds, 15 ounces, if you have one bigger then this setting allows you will know which one it is, and setting weight on each ball is quick and simple. No more reweighing, extra handling or extra stress on fish. Thanks to SmartCull, it’s never been easier to make sure you’re keeping the best, and getting rid of the rest.