T&Uuml;RLEN 0-1"/0.0005" Dial Indicator AGD Spec w/Lug Back Carbide Tip High Visibility High Precision Easy to read 2-1/4'' Black face with white markings Crisp graduations. Rotating durable satin anodized finish bezel. Spindle rack pinions and gear trains are made of high quality steel components ensuring long life Super Hard Carbide Tip. Interchangeable tip with 4-48 thread Graduations: 0.0005'' per line, 0.05'' per revolution