Gone are the days when a plastic ruler would do. Cheap, simple rulers for kids dont need to be nearly indestructible; this flat metal ruler does. This 18-inch stainless steel ruler is rust-proof so youve always got the high-quality precision ruler you expect. And unlike any stiff, fragile, long wooden ruler, this stainless steel flexible ruler can be manipulated over curved surfaces without breaking or facing damage. Enjoy the handling and versatility that even other metal rulers simply cant match.