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A try square is a woodworking or a metal working tool used for marking and measuring a piece of wood. The ''square'' refers to the tool's primary use of measuring the accuracy of a right angle (90 degrees); to ''try'' a surface is to check its straightness or correspondence to an adjoining surface. A piece of wood that is rectangular, flat, and has all edges (faces, sides, and ends) 90 degrees is called four square. A board is often milled four square in preparation for using it in building furniture.〔http://www.technologystudent.com/equip1/try1.htm〕 A traditional try square has a broad blade made of steel that is riveted to a wooden handle or 'stock'. The inside of the wooden stock usually has a brass strip fixed to it to reduce wear. Some blades also have graduations for measurement. Modern try squares may be all-metal, with stocks that are either die-cast or extruded. 'Try square' is so called because it is used to "try" the squareness. ==See also== * Combination square * Machinist square * Set square * Steel square * Speed square 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「try square」の詳細全文を読む スポンサード リンク
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