mitre square

noun

1. a tool with two blades that are at a fixed angle to one another, used to bevel a mitre joint

Example Sentences

When permanently fixed at an angle of 45, it is called a mitre-square.

From Project Gutenberg

By placing this bevel against the edge a try-square of this construction can also be used as a mitre-square (Fig. 682).

From Project Gutenberg