With two independently adjustable rods, this gauge lets you set two measurements at once, so you can quickly alternate between them when transferring or marking repetitive dimensions. Projection up to 5-3/4″ is easy to set, since an internal O-ring keeps light but constant friction on each rod; a thumbscrew locks the setting.
The hardened steel wheel cutters scribe perfectly at any point of their circumference. Since they cut wood fibres rather than tear, marks are clean, even on cross grain. The cutting wheels are oriented with opposing bevels, ensuring that you can always set the bevel in the waste side of a cut. One rod has its cutting edge at the extreme end of the rod, making it useful for transferring dimensions such as tenon shoulder and mortise depth. Each cutter can be retracted into the brass face for safe storage or to permit use with a single cutter.