How to use a try and mitre square?

Before you begin

To check an angle

Step 1 – Place square

Place the stock against one of the edges around the angle you wish to check and then slide until the blade is flush with the other edge.

Step 2 – Check for gaps

Check between the workpiece and the tool for gaps. Your view may be improved by having a light source behind, as you will be able to see the light shining through any gaps.

If there are no gaps then the tool is completely flush and the angle is correct.

To mark for a cut

Step 1 – Measure distance

Use a rule or a square with a scale to measure the distance from the edge you wish to remove.

Mark this point with a pencil or marking knife.

Step 2 – Place square

Place the square in the same way as you would to check an angle.

Step 3 – Slide square to measurement

Then, hold the marking knife or pencil on the mark you have made, slide the square’s blade up to the marking, stopping when the two apparatuses meet.

Step 4 – Mark workpiece

Mark along the whole length of the blade.

Step 5 – Repeat

If you need to mark the other sides of the workpiece, use the same technique.

Place the stock on the side you have already marked and  the blade on the side to be marked. Use the marking knife or pencil to line up the tool and the marking. This only works for try squares and 90° angles.