These Lenker-style rods are used to measure direct elevations for cut and fill. They're made of high strength clear anodized aluminum for lightweight rugged, dependable operation. They will not rust, split, splinter swell or warp in any environment. The tape has a heavy duty matte textured face and is easy on the eyes in bright sunlight. These lenker rods come in tenths, inches and metric and come in a variety of lengths.