An adjustable wrench, also known as a crescent wrench or adjustable spanner (in British English), is a versatile hand tool used for turning nuts and bolts of varying sizes. It features an adjustable jaw that can be moved to fit different sizes of fasteners, making it a convenient tool for various applications. Here’s more about adjustable wrenches and their uses:

Features of an Adjustable Wrench:

Adjustable Jaw: The key feature of an adjustable wrench is its movable jaw, which can be adjusted by turning a worm gear mechanism. This allows the wrench to fit nuts and bolts of different sizes.
Scale or Markings: Many adjustable wrenches have a scale or markings on the wrench body that indicate the jaw opening size. This helps users quickly set the wrench to the desired size.
Uses of Adjustable Wrenches:

General Fastening and Loosening: Adjustable wrenches are used for tightening or loosening nuts, bolts, and other fasteners. Their adaptability to different sizes makes them a go-to tool for many applications.
Plumbing: In plumbing tasks, adjustable wrenches are often used to work with pipe fittings, compression nuts, and other plumbing connections.
Automotive Repairs: Adjustable wrenches can be used for various automotive tasks, such as loosening or tightening bolts on car parts, changing oil filters, and working on engine components.
Household Repairs: They are handy for common household tasks like assembling furniture, fixing appliances, and repairing bicycles.
Maintenance and DIY Projects: Adjustable wrenches are essential in DIY projects and maintenance tasks, where you encounter a variety of fastener sizes.
Emergency Repairs: Due to their versatility, adjustable wrenches are useful in emergency situations when you might not have specialized tools readily available.
Tips for Using an Adjustable Wrench:

Select the Correct Size: Ensure that the adjustable wrench is set to the correct size for the nut or bolt you’re working with to avoid slipping and damaging the fastener.
Positioning: Position the wrench on the fastener so that the force is applied in the direction that tightens or loosens the fastener.
Firm Grip: Hold the wrench securely to prevent it from slipping during use.
Avoid Over-Tightening: Be cautious not to over-tighten fasteners, as this can damage the threads or strip the nut/bolt head.
Use the Correct End: The adjustable wrench has two ends to its jaw, one smooth and one with teeth. The toothed side is used for gripping, while the smooth side can be used as a contact surface to prevent marring or scratching on surfaces.
Adjustable wrenches are versatile tools found in the toolkits of professionals, DIY enthusiasts, and homeowners alike. Their ability to adapt to different fastener sizes makes them invaluable for a wide range of tasks.