A hand tool used to mark and verify angles across the face or edge of a workpiece. Unlike a standard try square set at 90 degrees, this tool has a blade permanently fixed at an angle, most commonly 45 degrees for cutting picture frames, trim, and corner joints. The fixed nature ensures absolute repeatability without the risk of a moving pivot.
Heard on the job
Grab the miter square and check if this casing is actually cut at a true forty-five.
Do not mix it up with
- Try-miter square: A try-miter square combines a 90-degree edge and a 45-degree angle in one handle, while a dedicated miter square only checks the miter angle.