This Big Horn marking gauge lets you make perfect line layout marks both with and across wood grain. The hardened steel cutting wheel is beveled on one side, creating a natural pull that forces the face of the gauge against your work piece for straight, wander-free marks. The single Bevel edge wheel scribes a fine line without tearing the wood fibers and does not wander with the Wooden grain. Features a solid brass body, knurled lock nut, graduated scales and a recess to protect the cutter in storage.