DBL bore gages are designed to be lightweight, versatile, accurate, and are ideal for toolroom and production applications. The DBL series bore gages feature two point gaging and three point centralization. The gaging contacts are diametrically opposed, providing the most accurate reading of the bore. The reference contact accepts various length range extensions and adapters to change the measuring size of the gage without the loss of accuracy or balance. The independent external centralizer with two fixed carbide ball locators aligns and self-centers the gaging pin and reference contact during operation. The centralizer ensures locating and reading the true diameter. Five models cover a measurement range from .25" to 6". All DBL series gages include carbide centralizing contacts, a .0001" graduation dial indicator and fitted wooden storage box.