How to use an adjustable wrench properly? | March 22, 2025

The adjustable wrench is found in almost every toolbox, but few people really know how to use it properly. However, improper use can damage your nuts, bolts, and even the tool itself! Think you’re doing everything right? You might be surprised. Here are the most common mistakes and tips for using your adjustable wrench like a pro.

1. Using it as a fixed key: a classic mistake

You might think that an  adjustable wrench  can replace  a flat wrench …  Wrong!  Unlike fixed wrenches, it  doesn’t offer  a perfect fit, which can  damage  the nuts and the wrench itself.  Overtightening  can also  deform  parts.
The solution?  Adjust  the opening carefully  to  reduce play  and avoid using it for tightening operations requiring  high torque .

2. A loose jaw: watch out for damaged nuts

An  improperly adjusted adjustable wrench  can quickly  round off  nuts and make them  impossible to unscrew .
Tip:  Take the time to  tighten the adjusting screw  so that the jaw  fits snugly against  the nut faces.  Just a millimeter  of play can be enough  to slip and damage  your part.

3. Do not use it on screws that are too small

If you’ve ever tried to use an  adjustable wrench  on a  tiny screw , you’ve probably noticed  a lack of grip .

Why?  The design of the tool  does not allow for  optimal grip on  very thin elements .

Solution:  In these cases, use  a flat wrench  or  a suitable socket instead .

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