Editing Try square (section)

== Accuracy ==
{{See also|Square (tool)#Accuracy}}
A square can become less accurate over time through both common use and abuse, such as the edges becoming worn over time or the square being dropped or mistreated. Wooden squares can also vary with changes in temperature and humidity. For this reason more dimensionally stable woods, such as mahogany, are preferred.<ref name=":5" /><ref name=":0" />

There are a number of methods for correcting an inaccurate square by hand. Wooden blades can be corrected using a [[Plane (tool)|hand plane]] and sandpaper, while metal blades can be corrected using a [[File (tool)|file]], [[emery cloth]], or [[sandpaper]].<ref name=":0" /><ref>{{Cite web|title=How to correct an engineer's square that is not square?|url=https://www.wonkeedonkeetools.co.uk/engineers-squares/how-to-correct-an-engineer-s-square-that-is-not-square|access-date=2020-10-22|website=Wonkee Donkee Tools|language=en-GB}}</ref>
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File:Cc&j-fig5--try and mitre square.png|Try square with a 45° mitred stock.
File:Carpenter's Square MET 20.3.90.jpeg|[[Ancient Egypt]]ian try square from the 20th century BC. Discovered in 1920 in the [[TT280|tomb of Meketre]] near Thebes.
File:Vinkelhake - Skoklosters slott - 99789.tif|Traditional wooden try square with a slightly curved profile on the blade, from the [[Skokloster Castle|Stokloster Castle]] collection.
File:Rubens apostel jakobus mindere grt.jpg|Painting by [[Peter Paul Rubens|Rubens]] of [[James the Less|St James the Less]] clutching a try square, a symbol associated with several Christian saints.<ref>{{Cite web|title=Dictionary : CARPENTER'S SQUARE|url=https://www.catholicculture.org/culture/library/dictionary/index.cfm?id=32346|access-date=2020-10-19|website=www.catholicculture.org}}</ref>
File:Testing a try square for accuracy.png|[[Square (tool)#Accuracy|One method]] for testing a woodworker's try square for accuracy.
File:Fotothek df roe-neg 0002480 002 Jugendlicher Häftling und weitere Person bei der Holzbearbeitung.jpg| Young prisoner in 1950 using a try square for woodworking. 
</gallery>