The Lufkin Executive® diameter pocket tape measure is ideal for measuring diameters of pipes, cable, tires, and other circular objects. It comes in a polished chrome case, and the yellow blade (blade style A20) has easy-to-read bold graduations. The zero falls on the same place on each side of the blade, and for conversion from diameter to circumference, you simply turn the blade. The tape shows diameter in inches to 1/64ths.