The Fishing Tube is designed to make quick work of measuring fish. You simply stick the head in the tube, make sure that the head is touching the end of the tube, pinch the tail and measure! If you want to keep it, in the live well it goes, and if not, you can slip it right back in the water. There are no sharp edges in the tube, ensuring that the fish will not be harmed in the measuring process. The process of measuring is so simple, the fish is back in the water in no time, and you can get back to fishing!