Double Open End Spanner
A double open-end spanner, also known as a double-ended open wrench or spanner, is a hand tool designed for tightening or loosening nuts and bolts. It features two open-ended jaws of different sizes at opposite ends of the tool, allowing the user to work with two different-sized fasteners without the need to flip the tool. The open ends are typically U-shaped and parallel, providing a snug fit on the fastener's flats. This design makes double open-end spanners useful in various applications where access is not restricted and where a quick switch between two different sizes of nuts or bolts is required.