Fowler 18" Dial Calipers Features Include... Measuring Range: 0-18" Graduations: 0.001" Adjustable Bezel with Locking Device Jaw Length: 3.125" Dial Color: Black 0.500" Internal Measuring Nibs 4-Way Measurements: inside, outside, depth & step Hardened Stainless Throughout Shockproof Design Furnished in fitted case