Joseph Marples Trial 1 Mitre Square

joseph marples mitre square
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J.Marples Trial 1 Mitre Square Review By: I.Ball

Category: Squares

Manufacturer: Joseph Marples

Tool Type: Mitre Square

Model No's: T15


The Joseph Marples 'Trial 1' Mitre Square review covers the 'Trial 1' mitre square manufactured by Joseph Marples Ltd of Sheffield, England.

The Joseph Marples 'Trial 1' Mitre Square is a traditional, quick-and-easy tool for measuring and marking a mitre 45 degree angle.

This beautiful tool is made with the choice of a Rosewood or Walnut stock with a 10" blued steel blade.

These generally were made in Rosewood up until about 2019.

The stock is given a thick 3mm (1/8") brass edge on both inside and outside edges for decorative purposes and to help prevent damage to the stock which in turn helps to maintain accuracy.

joseph marples trial 1 mitre square

The blade is secured to the stock with the use of four brass diamond shaped rivots.

The wood is given great contrast with these brass parts as can be seen.

The stock is marked in gold colour with 'Joseph Marples Ltd, Sheffield, England' along with the 'Trial 1' logo.

Joseph Marples advertise (at the time of writing this review) each square has been tested for accuracy two times during the manufacturing process and again just before leaving the factory.

The Joseph Marples 'Trial 1' Mitre Square product code at the time of writing this review was T15.

joseph marples mitre square

The Joseph Marples 'Trial 1' Mitre Square forms part of the 'Trial 1' range which is made up of:

- Joseph Marples 'Trial 1' Try Square - 6"
- Joseph Marples 'Trial 1' Try Square - 9"
- Joseph Marples 'Trial 1' Try Square - 12"
- Joseph Marples 'Trial 1' Mortice and Marking Gauge
- Joseph Marples 'Trial 1' Mitre Square - 10"
- Joseph Marples 'Trial 1' Sliding Bevel - 9"

Joseph Marples also offer the full range of 'Trial 1' tools as a set in the form of the:

Joseph Marples 'Trial 1' Tools Box Set

joseph marples mitre square

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 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.

Manufactured Dates

? - Today

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 safety, personal 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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