US Patent 7232119 Vice for tying a hook for fly-fishing

A vice for fly tying comprises a support disposed adjustably on a suitable base plate, a maintaining base attached on the support and provided with a fastening screw on its side surface, a revolving knob connected with the maintaining base at its rear end, a revolving base rotatively connected with the maintaining base at its rear end, through a through hole of the later by an axle bar of the revolving knob, and a holding member pivotally connected with the revolving base, through two pairs of movable connecting plates attached to both sides of the later and a connecting axle bar attached on its rear end portion. The holding member comprises an axial holding piece made of a magnetic inductive material and a movable holding piece, and is provided with a pair of adjusting screws at its rear portion and front portion, a magnet on an inner surface of the former piece, a spring held between the both inner surfaces of both pieces and a rubber ring wound centrally on both pieces, so that the fly hook can be exactly held between the both pieces of the jaw portion for fly tying.