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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.
In 1878 Laroy S. Starrett invented and patented the first combination square, [4] and in 1880 he founded the L.S. Starrett Company in Athol, Massachusetts, in order to produce it and other precision tools. In 1882, Starrett traveled to London and Paris to appoint sales representatives, thereby starting up the international marketing of his ...
A 250 mm x 250 mm surface plate. A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup. [1]
The most common form consists of an L-shaped stock with the blade fixed on top bisecting the stock. [4] Another type is made from a single piece of metal with two perpendicular pins which are placed against the edge of the workpiece. [5] [6] Centre squares are also manufactured to be used as a head for a combination square. [7]
A sliding T bevel, also known as a bevel gauge or false square [1] is an adjustable gauge for setting and transferring angles. Different from the square , which is fixed and can only set a 90° angle , the sliding T bevel can set any angle and transfer it on another piece.
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