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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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Mortise Gauge

This version can score two parallel lines and may be used to mark off the edge of a door for a mortise lock. It has two pins — the top one is fixed in place and the lower is adjustable and is used in the same way as the marking gauge. On some models, one fixed pin is provided on the reverse, so that the tool can also serve as a marking gauge.



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