Never guess a Brown or Lake Trout weight again. The award winning Brown & Lake Trout Release Ruler is the must have for serious Brown & Lake Trout fishermen. Release Rulers are patented as the only ruler to provide weight and length estimates of fish on the same device, pairing length with color-coded weight brackets that make for instant weight estimation and great pictures. Simply measure the overall Brown and Lake Trout length, take a picture and release. The Release Ruler’s contrasting colors estimate the Brown & Lake Trout weight based on scientific growth charts. The ruler is durable, tear-resistant, easy to stow and charts weights from juvenile to HUGE!