KESON Diameter Tape Measure: Loop Tip, Narrow Blade, 1/100 in/1/16 in, Silver, Steel, Yellow, PD618N

Diameter-scale tape measures wrap their narrow, flexible blade around circular or cylindrical objects and determine the measurement across the object. Also known as d-tapes, they have graduations in pi units that convert circumference measurements into diameter measurements. They measure trees, poles, pipe, cable, round stock, and other objects that are too large or too tightly packed to measure with micrometers or calipers.