General Tools 837 Contour Gauge Duplicator, 6-Inch PRECISE CONTOUR DUPLICATION- allows you to duplicate a profile exactly for hobby woodworking, precise woodworking or tile flooring/linoleum installation where you want to replicate the shape of moldings, cut outs around door casings and pipes QUICKLY AND EASILY - record the cross-sectional shape of a surface with this 6-Inch gauge. With 35 leaves-per-inch, this contour gauge duplicator assures creation of an exact replication of the copied shape ULTRA-THIN PINS- measure profiles up to 3-1/2 inches deep INCH MEASUREMENTS- rule markings with inch graduations are on the tough and durable plastic body of the gauge STAINLESS STEEL PINS  designed for a precise contour and long-lasting use