GTR tamping rod is a round, straight steel rod used with concrete
cylinder molds, slump cones, and unit weight tests. Measures 5/8in.
diameter by 24in. length. Both ends are rounded to a hemispherical tip.
The tamping rod is plated for rust resistance and has a 6in. scale in 1/4in.
increments engraved on end of the rod for measuring the slump.
Meets ASTM C138.