For placing screws on bone blocks. Used for grasping and holding a bone during a surgical procedure. It is typically strongly constructed and has a scissors-like design that may or may not be self-retaining with ring handles or curved shank handles. It is available in various sizes and the working end can have a wide variety of jaws designs, e.g., curved serrated jaws, straight toothed jaws, or profiled wrench-like jaws with grooves to provide extra grip of the bone..