A Starrett combination square with a standard head
Other names
Combo square
Adjustable square
Sliding square
Classification
Hand tool
Type of square
Inventor
Laroy S. Starrett (1877)
A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule.[1][2] Other names for the tool include adjustable square, combo square, and sliding square.
The most common head is the standard head, which is used as a square for marking and testing 90° and 45° angles.[3] The other common types of head are the protractor head, and the centre finder head.[4]
^Dotson, Connie (2015). Fundamentals of Dimensional Metrology. Cengage Learning. pp. 100–106. ISBN 978-1305177741.
^Raghavendra, N. V. (2013). Engineering metrology and measurements. Krishnamurthy, L. New Delhi: Oxford University Press. pp. 89–91. ISBN 978-1-68015-280-7. OCLC 900729269.
^Campbell, Paul D. Q. (1995). An Introduction to Measuration and Calibration. Industrial Press Inc. ISBN 978-0-8311-3060-2.
^Livesey, Andrew; Robinson, A. (11 February 2013). The Repair of Vehicle Bodies (6th ed.). Routledge. p. 93. ISBN 978-1-135-12049-8.
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