Inches Sliding Dial Caliper for Jewelers, Machinists, Electronics, Auto Mechanics & Measuring This is a sliding dial caliper It has finely honed jaws for exacting inside, outside and depth measurements Has a large 1 1/2" (38 mm) diameter dial that makes it easy to read graduations Has a thumb screw adjustment for easy calibration and a thumb roller with lock for ease of use This is economical and lightweight Measures in inches only Graduated in 1/10" increments It measures up to 6" The caliper measures approximately 9 5/16" x 3" (236.5 x 76 mm) Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.