GR1450M - 5-meter in metric scale reading down to 1/2 cm 

Aluminum front and rear rods. - Made of high strength clear anodized aluminum for lightweight rugged, dependable operation. They will not rust, split, splinter swell or warp in any environment. Tape has heavy duty matte textured mylar face. - Easy on the eyes in bright sunlight. Protects the tape numbers from wear and fading. Tape lock grommets are oversized. - Heavy duty brass. Greatly minimizes the problem of tape tearing. Detector rail is black, high density, U.V.stabilized for long life. - Specifically designed to not become brittle when exposed to ultraviolet rays or direct sunlight. Solid tape lock with internal brake slide. - Stronger, trouble-free operation. Tape lock pin cannot puncture tape. - Designed not to tear puncture or rip tape when pushed against tape face instead of the grommet hole. DuPont nylon parts. - Tough and rugged for long-lasting life. Same material used for ski bindings and motorcycle parts.

Laser Version Direct Reading/ True Elevation Rods

For use with a laser detector. There is a special
rail slide and Laserline detector bracket that
lets the laser detector travel the full working
length of the rod. This allows faster and easier
readings because it takes the awkwardness
out of having to loosen the detector, move
the detector, then tighten the detector for
each reading.

HOW THEY WORK:

Direct Reading/True Elevation Grade Rod

Direct Reading, or True Elevation (also known as Lenker style) is a Grade Rod with a moveable tape face
allowing you to set the actual benchmark elevation, or any elevation, above or below the bench into the
rod. The actual true elevation above sea level is read on these rods, thus eliminating errors caused by adding
or subtracting. Since no math is involved, grade shots are much faster than conventional style rods.
On most jobsites, the bench elevation is typically established by survey, and all elevations on that project are
above that or below primary bench elevation.

EXAMPLE:

In the USA, these elevations are typically represented in feet, tenths and hundredths of a foot as per the example.