Japan Woodworker - Oakybo Combination Gauge
This gauge from Japan Woodworker features two adjustable knives that are reversible for use with either hand.
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.
This Japanese combination gauge has a white oak fence, reversible beams, beveled steel cutting blades, and a brass thumbscrew.