For Hackaday readers who spend more time with a soldering iron than a saw, a marking gauge is a tool used to put parallel lines on a piece of wood (and occasionally metal or plastic) for cutting.

Set the marking gauge for half the thickness of the timber and mark the depth of your cut on the wood. Now, do the same on the second piece of timber. Mark the limits or width of the cut using a ...

A marking gauge, comprised of a ruler ... The wheel rolls as it slices a clean mark, and tends not to catch on the wood grain ...