Supports the following standards: ASTM D2850, ASTM D4829, ASTM D1883, ASTM D2166, ASTM D2435, ASTM D4546, ASTM D5333 Indicators are built to American Gauge Design specifications for accuracy and are used in field and laboratory testing applications. Dials are high-quality, low-friction type, designed for long life and accurate repeatable readings. All dial indicators have continuous graduations and revolution counters that show revolutions of the indicator hand. They are furnished with a lug back (with a 90° mounting hole to be used vertically or horizontally), a regular contact point .25" long, and a dust cap. Specifications Standard Dial Gauges have clockwise rotation. Models with a CC suffix have counter-clockwise rotation.