Dial Test Indicator, Horizontal TypeSeries 513This is a Dial Test Indicator (Lever Type) which offers you the following benefits:<ul><li>Drastically enhanced durability, sensitivity and visibility.</li><li>Glare-free flat crystal face allows easy reading of graduations.</li><li>O-ring seal on the bezel has the effect of providing smooth rotation and prevents dust and oil from penetrating through to the dial face.</li><li>The stylus length is on the dial face to reorder a replacement </li><li>Multi-layer coatings on the crystal.</li></ul>