The clock is made of a metal body with a paper calendar with values ​​from 0 to 100 in increments of 10. The body of the clock is crossed by a shaft that comes out on the top side of the clock, on the bottom side of the clock the second part of the shaft comes out, to which a rectangular body is attached, reinforced by two screws in the lower part, a short short that touches the edge the axis. Measuring the thickness of objects is done by inserting the measured object between the end of the axis and the top of the lower rod.