Japan Woodworker - Oakybo Mortise Gauge
One of the two cutters on this mortise gauge from Japan Woodworker can be recessed into the fence to mark a single scribe line.
Marking, mortise, and combination gauges come in myriad styles and prices. What differentiates them from one another is the number and type of cutters each employs. Marking gauges have a single cutter for scribing one line at a time. Mortise gauges have two cutters and are used mostly for marking parallel lines to establish the width of a mortise. Combination gauges typically have three cutters: a single cutter on one side of the beam for use as a marking gauge and an additional pair on the other side of the beam for laying out mortises.
Simple, light in the hand, and appealing, this Japanese gauge has a red oak fence and beam, a brass thumbscrew, and beveled steel cutting blades.