If the response to our article on the Tiruler is anything to go by, there's a lot of interest in folding-ruler multitools.

Chances are you already need a steel ruler for your fixing and making tasks, so why not use one that can do much more than ...

STEP 1: Using a pencil and ruler, draw a horizontal line. Set the compass to the width of the line. Place the compass at either end of the line and draw two arcs that cross in the middle.