Combination square
Measuring and marking tool / From Wikipedia, the free encyclopedia
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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.
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Inventor | Laroy S. Starrett (1877) |
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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]