The assistant carefully sets a metal ruler next to the object in the hole.

So they'd beat all 100 of us with metal rulers.

Turning a metal ruler so that it ran from the red dot, Burbank drew a line of his own.

Use a metal ruler or carpenter's level as a straightedge, the longer the better.

If you have confidence in your visual judgment you can do this by eye, otherwise use a long metal ruler.

After two failures, Bonassoli eventually agreed that it could easily detect a metal ruler.

Then a metal ruler was pressed against one ear.

"And what do you call that little metal ruler?"

Hold a long metal ruler against the tracks to check for straightness and make sure all sections are in line.

The metal ruler flashed and the skin split across my knuckles.