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How to Use Squares, Bevels and Gauges

Learn about the variety of tools used to make and measure angles and guidelines.

Excerpted from Do It Yourself Home Improvement

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combination square measures if a surface is level
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Combination Square

This square features a steel rule that slides within the stock of the square. Use it for determining 45-degree angles, scribing (marking a material to fit exactly against a wall or ceiling) and finding levels. It is also ideal for measuring small rabbet or grooved cuts. A step up is a combination set, it has a 180-degree protractor for producing angled guide lines.



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