Marples - Combination GaugeThis beech wood combination gauge from Marples is two sided with a single spur on one side for marking single lines and a double spur on the other for marking parallel lines.
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 beech combination gauge from Marples has standard sliding adjustment and a plastic thumbscrew. It’s also available in rosewood and brass.