Big Horn 26018 Beech Wood Marking Gauge is manufactured from the finest kiln dried beech wood. It has a plain head with plastic thumbscrew. Big Horn marking gauges, featuring beech construction, are designed to accurately mark your material prior to sawing, chiseling, or cutting. The Marking Gauge is a single pin construction with thumbscrew adjustment and radius bottom edge. This beech wood marking gauge features a radiused bottom edge to slide easily on the material being marked.