The Universal Tape Gauge from DowelMax is designed to improve the accuracy of any standard tape measure to 1/64-inch or better. The precision molded body has an adjustable rear stop for calibration, an adjustable lens for different sizes of tape measures, a crosshair referenced at 5-inch to the rear stop and 1-inch to the forward stops. The forward stop is tapered for transferring an inside measurement to a workpiece. The Universal Tape Gauge is priced at $15.99.