Where does this come from, and can I check it?

The raised handle registers against the edge and holds the blade square. The figure is taken from National Institute of Standards and Technology, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a everyday life fact?

Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

A try square keeps its blade at ninety degrees

The raised handle registers against the edge and holds the blade square The stock is a thick block, often with a brass facing, that sits flat against the workpiece edge, while the thin blade projects at exactly 90 degrees. Because the stock is deeper than the blade, the tool stays upright without support. Checking squareness means looking for light between blade and work rather than trusting the eye. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

National Institute of Standards and Technology

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Technology trivia General Knowledge trivia

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Tags: tools, woodwork, measurement

A try square keeps its blade at ninety degrees: the short answers

Where does this come from, and can I check it?: The raised handle registers against the edge and holds the blade square. The figure is taken from National Institute of Standards and Technology, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?: Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.