Examples include workshop vises, adjustable clamps, and improvised devices such as weights and furniture. Machine vises are mounted on drill presses, grinding machines and milling machines. Some of the tools used include pliers, pin vises, file, wire cutters, and mandrels. Woodworking vises are attached to a workbench, typically flush with its work surface. Clamp-on vises are basically very light-duty bench vises. Some vises have a rotating design to provide both bench and pipe jaws. Today, most vises use a big screw to apply the clamping force. Jewelers also use vacuum vises to hold jewelry. Most homeowner's bench vises have an exposed screw. Most engineer's vises have a swivel base. Some vises have a cast iron body but a steel channel bar. Design catalogues featuring Parker vises design are also a significant collectible. Some unique vises combine these features in a rotating design. This type of misuse is frequently covered in the instruction manuals for vises. Not only are these vises easy to install and use, they are also robust.