This is a high-precision, industrial quality Dial Caliper made of the finest satin-finish stainless steel. The finger-tip drive roller and zero-backlash gearing rotate the pointer in smooth, precise movements. The large, easy-to-read dial is zero adjustable and clearly graduated in thousandths of an inch. Measures inside, outside, depth and step up to 6 inches. Includes foam lined hard-shell case for protected storage.