This is an auxilliary vice that clamps into any larger vise.
It holds the work at a 45° angle from vertical for detail filing or chamfering.
Forged Steel, currently made in France.
The handmade angle or chamfering clamps above are from Donald Streeter's Professional Smithing,
Streeter references Diderots Encylopedia
circa 1770 as showing similar tools.
Here the tool is called a King Forcepts or a Clamp Hook.
However, if the tool was made elsewhere the names may have already been translated say from French to Dutch and the translation to English something even different.
The tool in the middle, "Iron Span Clamps" is a fancy soft jaws device that uses replaceable wood and copper inserts.
The tool in the bottom is a set of wood soft jaws.
- Dimensions: About 5" overall.
- Weight: About 1 pound.