Caution, do not use on metal. It says they will work on metal, that's not true. It's a good way to get hurt, that's all I'll say about it. Wood, 100% Metal, 0% Plastic, Other Materials, 90% - 100% It's ok for the money, but the item is not 100% described correctly. I don't think it's titanium either. Seems too soft as the wood scratches the surface.