Midwest's Scale Lumber Gauge is designed expressly for use with Midwest's Basswood Scale Lumber and other hobby woods, making it even easier to quickly and accurately identify and size the material while building. The tool features built-in strip identification gauges in three popular model railroad gauges (O, HO & N) the in. = 1 scale, popularly used by architectural model makers, is also included, as is a built-in 12-inch ruler with both English and metric measurements. Midwest's Scale Lumber Gauge is constructed of rugged plastic.