The Renzetti Traveler 2304 Cam Vise is a true rotary vise built to last a lifetime of fly tying. The jaws securely hold flies from size #28 to size 4/0. All of the aluminum parts are anodized for durability. The 2304 features a few upgrades. One being the larger base (6×6 as compared to the 2300 which is 5×5). The larger base adds more stability and stem support. The new material clip is the other nice little upgrade.