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Adjustable Spanners: What are they, what are they for, and how to use them

Adjustable spanners can be found in any car garage and are used to tighten nuts and bolts of various sizes without mechanics needing to switch between spanners.

In this article, we’ll be explaining what an adjustable spanner is, what it’s for, and how to use one. Keep reading!


What is an adjustable spanner?

Adjustable spanners are tools often used in car garages. They are made out of metal, and their jaws are adjustable.

The latest developments have led to these types of spanners being coated in an isolating material, which means they can now be used to work on electrical components, and that they are now made out of reusable materials.

If you want to find out more about how to take good care of your vehicle’s electrical components, check out our article Car electrical components: How to repair and maintain them.


What are adjustable spanners used for?

Adjustable spanners are used to tighten nuts and bolts in various vehicles.

As their jaws are adjustable, this type of spanner can safely tighten nuts and bolts of different sizes in a short space of time.



How do you use an adjustable spanner?

  1. Place the spanner head next to the nut or bolt;
  2. Rotate the metal spiral with your thumb to adjust the width of the jaws;
  3. Align them around the nut or bolt;
  4. Adjust the spanner to ensure that the jaws are properly fitted around the nut or bolt;
  5. Take a closer look to ensure the spanner jaws are touching at least three sides of the part;
  6. Turn the spanner lever counter clockwise to release;
  7. Rotate the lever clockwise to tighten the spanner around the nut or bolt;
  8. Re-tighten the jaws of the spanner after every use.


What care should you take with an adjustable spanner?

  • Wear work gloves;
  • Avoid using the spanner should it contain oil residue or that of other fluids;
  • Carry out maintenance on your spanner jaw adjustment;
  • Do not apply excessive force when using the tool;
  • Ensure that you use an insulated spanner when working with electrical wiring.

The KROFtools catalogue contains various types and sizes of adjustable spanners. Check out our range in the next section.


Which adjustable spanners are available in the KROFtools catalogue?

  • 20pcs VDE Insulated Adjustable Spanner and Open-ended Spanner Set

This set of adjustable spanners includes several sizes of open-ended spanners and one adjustable 10″ spanner.

As the name implies, all the spanners in this set are insulated and can be used in jobs involving electrical wiring.

Click on the image below to find out more about our 20pcs VDE Insulated Tool Set (Ref.3021).

  • Adjustable Spanner

Adjustable spanners can be purchased in various sizes: 6”, 8”, 10”, 12”, 15”, 18” and 24”.

The insulation on the tool helps improve the grip a user has on the spanner, avoiding electric shocks.

Click on the image below to learn more about our Adjustable Wrench (Refs. 10106/10108/10110/10112/10115/10118/10124).



  • 7-Piece Adjustable spanner, Stapler, and Utility knife Set

Our 7-Piece Adjustable spanner, Stapler and Utility knife Set is a fairly comprehensive kit you can add to your tool cart.

In addition to the tools mentioned, this kit includes 3 boxes with 500 staples of different shapes.

Click on the image below to find out more about our 7-Piece Adjustable wrench, Stapler gun and knife 7PCS (Ref.8571).



How much does an adjustable spanner cost?

The price of an adjustable spanner can range from between 6 to 530 euros, depending on its characteristics.

It’s worth noting that you’ll find adjustable spanners alongside other car tools in the KROFtools catalogue.

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