Various kinds of Spanners are used to tighten or loosen various jobs more than any other instrument. These are usually composed of carbon steel or drop-forge steel. These are created in a variety of forms and sizes to meet the needs of the customer. Screwdrivers can also be used to tighten and loosen any task or screw.

To remove or tighten a given size nut or bolt, various spanners are employed. All spanners are measured in millimeters and inches. Millimeter spanners come in a variety of sizes. 7mm spanners, like inch spanners, come in 1/16 and double-ended versions, while ring spanners come in sets of 6, 8, 12, and 36. The double-ended and ring spanners are available in the following sizes in a set of 6-inch spanners. 1 X 15/16 inch, 7/16 X 13/16 inch, 3/4 X 11/6 inch, 5/8 X 19/32 inch, 1/2 X 9/16 inch and 3/8 X 7/16 inch. Well, in this article, you’ll learn the various types of spanners and their uses.

Types of Spanner

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Types of spanners

The common types of spanners are open-end or single-end spanners, double-end spanners, ring spanners, socket spanners, box spanners, combination spanners, hook spanners, adjustable spanners, and T socket spanners, Magneto spanners, Allen key, and pin face adjustable spanner.

Open-end or single-end spanner

Only one end of these kinds of spanners is open, and the nut or bolt head is held to loosen or tighten it. A single-end spanner is another name for it. The gap between their jaws determines their size. As a result, the spanner is chosen based on the distance between the opposing surfaces of the nut or bolt. These types of spanners are known as D-spanner and they can be divided into two types – single and double-ended.

A single-sized bolt, head, or nut can be tightened with a single-ended spanner. In order for the hexagonal nut to receive a full revolution from the spanner’s “flopping” in just 30°, its opening is frequently displaced at a 15° angle. whereas Double-ended spanners come in a variety of sizes, including 6×7, 10×11, 30×32, and others. Like a single-ended spanner, it is employed. Double Open Ended Spanner is generally used for tightening and loosening rotary fasteners such as nuts and bolts.


open end spanner

Double-ended spanner

These types of spanners have open ends on both ends that can accommodate the heads of nuts or bolts. These two ends are constructed at angles ranging from 15 to 30 degrees to the body in between. The most popular spanners are of this sort.


Combination spanner

These types of spanners combine the functions of an open-end spanner with a ring. These spanners can be used to open and tighten a nut bolt of the same size at both ends.

combination spanner tools

Ring spanner

The ends of these spanners may or may not have holes. In order to grip the bolt or nut head from all sides, the hole is frequently cut with 12 notches. When using open-ended spanners is not an option, these spanners are employed. These rings are frequently bent at an angle to one another. Projected teeth are integrated into these rings, allowing six-sided nut bolts to be readily grabbed. It does not slip since it grabs all surfaces. Some ring spanners don’t have their ends bent.

Ring spanner set

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Allen key

These are thin steel rods with six faces bent at an angle of 90 degrees from one end. On the upper side, they have a six-faced hole. Tightening is accomplished with these bolts while maintaining the job’s surface level. These are available in a variety of sizes and quantities. The Allen Key, also known as a socket and screw wrench, is hexagonal and fits into the holes of the socket head or safety set screws.

Allen key

Box spanner

Thin or thick pipes are used to make these types of spanners. Their ends have six sides and are made on either one or both ends, making it easy to grasp nut bolts with six phases. On one or both ends, holes are placed across the rod so that a rod can be inserted and used as a handle. It is applied to deeper areas.

box spanner

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Adjustable spanner

These are specialized spanners, also referred to as screw wrenches. To tighten or loosen the nut bolts, its jaws can be stretched or shortened. They’re used for nuts that no other spanner will fit.

adjustable spanners

“T” Socket spanner

These spanners are almost identical to box spanners, but they have a fixed hand on top and a socket integrated into the bottom. These sockets come in a variety of sizes. They’re used in places where there is deep space.

T socket

Magneto spanner

It’s a collection of little single-end spanners. To tighten or open small nut bolts, a group of spanners of various sizes is connected together.

magneto spanner


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Pin face adjustable spanner

This spanner is produced by riveting two legs together. Each leg has a pin attached to the end of it. It’s used on round nuts with holes in the periphery for the spanner pin to go through. To utilize it on a variety of nuts, the space between its legs can be increased or decreased.

Pin face adjustable spanner

Socket spanner

In the shape of sets, these are available in small and large sizes. Along with these spanners, you’ll need a Tommy bar, Universal Tommy, and Ratchet Tommy. Nut bolts in slanting, straight, or congested spaces can be tightened or loosened with a socket spanner.

The shape of these spanners is that of a round socket. A square hole is drilled into one end of this type of spanner. On the other hand, like a ring spanner, grooves are carved outside in nut-bolt size. The Tommy bar, which has a square shape, is fastened in a square hole. These spanners are used when e-ring spanners cannot be utilized due to a lack of room. Apart from that, socket spanners are also used to tighten nut bolts after measuring their torque with a torque wrench.

Socket Spanner Wrench on White Background

Hook spanner

These types of spanners are designed for nuts that do not have holes around the perimeter. Hook spanners are also called C spanners. These nuts don’t have any faces on them. As a result, the spanner’s pin becomes lodged in the hole and performs the function of rotating it to open or tighten it.


That is all for this article, where the common types of spanners are been discussed. I hope you learn a lot from the reading, if so, kindly share with other students. Thanks for reading, see you around!