Choosing wires for a project requires knowledge of the difference between rigid and flexible wires. Flexible wires are suitable for movement and intricate environments or systems. They are built to bend and twist, which makes them highly suitable in cases where flexibility is crucial. On the other hand, rigid wires are perfect for installations that do not need movement because of the high stability and durability. They provide a strong connection even when under a lot of weight, which makes them ideal for industrial use. It all comes down to the scope of your project and its environment, as well as the movement that might be expected of the wire.