An adjustable wrench is larger than a fixed open-end or box-end wrench, but one adjustable alone can do the work of a number of fixed wrenches. The crescent has one jaw that is fixed and one that is adjusted by turning a worm screw.

• Amazon Brand - Denali 10-Inch, Adjustable Wrench.
• Amazon Basics Heavy-Duty Adjustable Straight Pipe Wrench, 10-inch.
• Amazon Basics Locking Adjustable Wrench, 10 inch x 2.7 inch x 0.75 inch.
• Amazon Basics Plumbing Adjustable Wrench with Soft Grip, Wide Mouth, 6 inch x 2.50 inch x 0.6 inch.

Adjustable spanner lengths and jaw capacities Wrenches are usually sized first and foremost by the diameter of fastener they can accommodate, with a secondary measurement given referring to the length of the tool's handle (longer handles generally allow for higher torque).

Crescent® Wide Jaw Adjustable Wrenches expanded jaw capacity allows for use with a greater range of fastener sizes than traditional adjustable wrenches. Each wrench does the work of the next larger size.

Their key role is to enable the tool user to achieve a firm tightening or loosening grip on multiple different sizes of fastener, as opposed to having to swap for a different non-adjustable spanner size every time they come up against a new gauge/diameter of nut, bolt or pipe section.

What is an Adjustable Spanner? An adjustable spanner is an open-ended wrench with a moveable jaw. Its function is the same as any regular spanner - to grip fasteners, such as nuts and bolts - however, only adjustable spanners can grip fasteners of all sizes, thanks to their moveable jaw.

Their key role is to enable the tool user to achieve a firm tightening or loosening grip on multiple different sizes of fastener, as opposed to having to swap for a different non-adjustable spanner size every time they come up against a new gauge/diameter of nut, bolt or pipe section.

Wrenches are made in various shapes and sizes and are used for gripping, fastening, turning, tightening and loosening things like pipes, pipe fittings, nuts and bolts.

They provide a tighter grip while tightening or loosening fasteners. Wrenches can be of many types, depending on their usage and function. While most wrenches in the market can fit over only a specific fastener size, the adjustable wrench is special because it can work with multiples sizes of nuts and bolts.

Basically, a wrench consists of a stout lever with a notch at one or both ends for gripping the bolt or nut in such a way that it can be twisted by a pull on the wrench at right angles to the axes of the lever and the bolt or nut.

Combination Wrench Combination wrenches have a closed loop on one side (box-end) for hexagonal or square nuts, while the other end is an open U-shape (open-end). These wrenches are often used for nuts that are hard to loosen. The closed-end can loosen the nut, while the open end is then used to unscrew it fully.

Wrenches are made in various shapes and sizes and are used for gripping, fastening, turning, tightening and loosening things like pipes, pipe fittings, nuts and bolts.