Cut perfect miters consistently with Kreg's Precision Miter Gauge System. A number of unique features makes this one of the most precise miter gauges on the market today. Factory calibrated accuracy starts with a gauge head that is machined on a computerized milling machine for absolute precision. An easy-to-read Vernier scale enables precise angle adjustments up to 1/10th of a degree. Five patented bar adjusters take up the play in the miter slot for a perfect fit. A 24" fence section with patented Swing Stop and self-adhesive measuring tape is included.Factory calibrated... perfect right out of the box