Electronic
Vernier, Dial, and Electronic Calipers give a direct reading of the distance measured with high accuracy and precision. They are functionally identical, with different ways of reading the result. These calipers comprise a calibrated scale with a fixed jaw, and another jaw, with a pointer, that slides along the scale. The distance between the jaws is then read in different ways for the three types.
Heavy Duty, Range: 24-120"
Standard, Range: 4-20"