From the Manufacturer
Designed for accurate marking of mortises and general marking uses. First side of the tool is used for general marking. It has 1 pin set in the stem for marking a single line parallel to the edge of the board. The second side of the tool is used for marking mortises. It has 2 pins: 1 fixed in the stem, and the other on an adjustable brass bar. To use, adjust the spacing between the pins to the size of your mortise.
Product Description
Highest quality beechwood has brass wear strips on the rubbing face. 1 side is for marking mortices and has a sliding adjustment mechanism. The other side has a single pin which allows the tool to be used as a traditional marking gauge. Thumbscrew locking
If you need help or have a question for Customer Service, 