Joseph Marples Trial 1 Try Squares

joseph marples trial 1 square
Our Rating

The Verdict

J.Marples Trial 1 Square Review By: I.Ball

Category: Squares

Manufacturer: Joseph Marples

Tool Type: Try Square

Tool Range: Trial 1

Model No's: T06, T09, T12

The Joseph Marples 'Trial 1' squares are the top of the range squares from the Marples squares range.

These Sheffield made, Joseph Marples try squares are made to traditional designs with tempered blades blended with stocks made from a choice of Rosewood or Walnut which are finished with brass parts that contrast and complement the rich wood.

The wooden stock is fitted with a thick brass plate on both the inside and outside edge of the stock; a feature which most try squares of this type don't have.

The brass plates are 3mm (1/8 inch) thick and are machined for accuracy.

joseph marples square trial 1

The additional brass plate gives the stock extra weight over the other Joseph Marples square designs and most similar try squares.

The brass plates also have the function of helping to protect the square from damage, maintaining accuracy, and giving the tool a great look of quality.

The Joseph Marples Trial 1 squares are made to the British Standard BS3322 with each square checked twice during the making of the tool for accuracy and once again just before leaving the factory.

The testing includes checking the inside and outside faces with the testing for the internal angle checking for accuracy which is twice as accurate as the British Standard.

Each Joseph Marples square comes with a 'certificate of calibration'.

The Joseph Marples Trial 1 try squares are available in three sizes:

- 6 inch
- 9 inch
- 12 inch

joseph marples trial 1 square

The Joseph Marples 'Trial 1' squares form part of a range of 'Trial 1' tools which can be purchased individually or as a box-set.

The Joseph Marples 'Trial 1' range is based on an old Joseph Marples square design from about the 1940's which also went by the 'Trial 1' mark.

Joseph Marples Ltd advertise the Rosewood used as coming from managed, sustainable sources.

The Joseph Marples tools are made in the 'York Works' factory in Sheffield, England. The current 'York Works' factory was purpose built in 2001.

Note: there was also an early Joseph Marples factory called the 'York Works'.

The Marples name has a long history in tool making. Different factions of the Marples name have been synonomous with good hand tools for many, many, many years.

joseph marples square trial 1

Joseph Marples Ltd continues the family line of Joseph Marples which has a lineage back to the 1840's.

The tools made today combine modern technology and traditional manufacturing methods to produce traditional tools.

For more information on the history of Joseph Marples go to the Joseph Marples history page.

Cautions / Notes

* Important: please refer to the 'disclaimer' at the foot of this review.
* Wearing safety clothing and eye protection is usually a good idea to help protect against injury.


Manufactured Dates

2002 - Today


Tool Also Known As

Trial 1 Rosewood Marples Square
J Marples Carpenter's Square


Joseph Marples 'Trial 1' Square History / Updates

From my observations, I believe in around 2019 Joseph Marples began offering Walnut alternatives to their Rosewood tools due I would imagine in part to the approaching new CITES updates on the import/export of Rosewood. From what I saw, the Rosewood version remained the popular option amongst retailers and woodworkers at this time in the UK.

From my observations, the choice of Walnut began becoming a mainstream option in around 2020-2021 when I believe there were Rosewood supply problems to the UK (possibly globally), I believe due to Covid related disruption, this I would imagine opened the door for some retailers to start stocking the Walnut version.


- Joseph Marples Ltd


(i) Please always refer to and follow the manufacturer's instructions / guidelines / safety notices / cautions and similar notices as the manufacturer's instructions may contain important information on your safety and the good health of your tool, something to which this review's scope does not guarantee to extend to.
(ii) This review may give warning(s) / advisory notes / cautions / guidelines given in good faith however any such information should not be solely relied upon and should not be seen as the exhaustive list of warnings / advisory notes / cautions / guidelines. Refer to disclaimer note (i) for information on safety, as well as the good health of your tool. In addition refer to good safety practices for the safety of you and others. Refer to good practices for the good health of your tool and property.
(iii) The details here are given in good faith, there is scope for error and shouldn't be fully relied upon, please be aware the details may also become out of date due to manufacturer changes to the product, please confirm any details for yourself by performing additional research from reliable sources.

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