A convenient clamp for woodworking, welding, bonding work, and machine assembly. [Features] Maximum opening 2.0 inches (50 mm) / Depth 3.9 inches (100 mm) [How to use] For objects you want to fix, rotate the handle of the main unit and spread the mouth of the unit while holding it. If the screw part is poorly moved, please lubricate (sewing machine oil). If the object scissors, please use a plaque or other similar material. Please do not use it as a hanging device. Please do not use it as a scaffold when attaching it to a scaffold or object. Please be aware that overtightening may damage the object. Please inspect each part before use and do not use if cracks, scratches, or damage are permitted.