The NWI 25-Foot Fiberglass Grade Rod is made of waterproof fiberglass and six adjustable sections that extend to 25 feet and collapse to 6 feet. And you can secure these sections with handy, built-in button locks. This rectangular grade rod is ideal for surveying, plot mapping, building, planning, grading, and leveling with glare-resistant scales, foot markings in red, and choice of graduations in eighths, tenths, and metric that remain visible in varying light conditions. You will also appreciate the included carrying bag for storing or transporting your grade rod.