marking gauge

An extra tile is then used as a marking gauge or guide.

A marking gauge, also known as a scratch gauge, is used in woodworking and metalworking to mark out lines for cutting or other operations.

Panel Gauge- large marking gauge.

IT IS NOT generally known nowadays, that the marking gauge - and mortise gauge - is traditionally a left-handed tool.

A marking gauge is a more specific form of wood scribe which is used to accurately mark wood for cutting, often for laying out mortise and tenon joints.

This permits shortening the blade, and makes the tool an accurate depth and marking gauge: set the blade so it projects past the handle at the depth or distance you want to measure.