This is a speciality clamp and vice designed exclusively for building model ships. It’s designed for plank-on-frame models. This sturdy wood vice grips the keel and holds it fast while you fasten the planking to the frames. It includes wooden parts, carriage bolts, washers and wing nuts, and it can adjust to any angle for a comfortable working position It also accepts any size keel, and is 18″ long. It does require assembly.