Our Marking Gauges (Kebiki Dai) are used to layout straight lines parallel to the edge of your work. They provide a far more precise, accurate line on stock than does a pencil. Unlike Western marking gauges, the cutters of Kebiki are sharpened with only a single bevel. This give a very clean line without any tearing of the grain. The blades are made from high carbon tool steel and the bodies from best quality Japanese White Oak or Japanese Red Oak. Japanese Red Oak gauge will cut from 0 - 3- 7/8". Our Mortise Gauge has two cutters for laying-out the parallel sides of a mortise. Since one of the cutters can be recessed, it can also be used to layout a single straight line.