This is a great improvement over the standard pin type marking gauges. The hardened steel cutting wheel will perfectly scribe at any point on its circumference. Since the wheel is sharpened and bevelled only on the inside, it cuts through the grain and forces the gauge face against your stock, maintaining accuracy. The gauge is particularly easy to set, as it has an internal "O" ring to keep light but constant friction on the stem. The anodized aluminum body has a 1/8" thick brass face and a brass thumbscrew.