Which tool can be adjusted to fit different sizes of nuts and bolts?

The adjustable spanner is designed to fit different sizes of nuts and bolts, making it a versatile tool in mechanical work. Its jaw can be opened or closed to accommodate various sizes, allowing for efficient use without the need for multiple fixed-size wrenches. This adjustability is particularly beneficial because it simplifies tasks that involve fasteners of different dimensions, streamlining the process and minimizing the number of tools a mechanic needs to carry.

In contrast, a fixed spanner is designed to fit only one specific size of nut or bolt, which limits its usability for varying fastener sizes. A socket wrench, while also capable of applying torque to nuts and bolts, requires a specific socket size to be effective, thus lacking the adaptability of an adjustable spanner. The ratchet wrench functions similarly to a socket wrench but includes a mechanism that allows for continuous motion without removing the tool from the fastener; however, it too relies on specific socket sizes and doesn’t have adjustable jaws. The unique feature of the adjustable spanner makes it the ideal choice for situations where multiple sizes need to be handled with one tool.