Berntsen 2" Aluminum Concrete Survey MarkerThe "CD" style aluminum concrete marker has a ¾" (19mm) diameter x 2" (50mm) long stem and is notched to hold firmly in concrete or rock. It is available in 2" (50mm) diameter and one-piece orbital formed from solid 6000 series aluminum.
Our aluminum material is versatile and resistant to most environment conditions, however, if the survey markers are intended to be used in high traffic or caustic environments, such as roadways or salty conditions, we highly recommend using bronze survey markers to improve the lifetime of the markers.
The CAPMAG ceramic magnet can be used with these concrete markers to assure easy detection of the mark with a magnetic locator 6 to 12 inches deep, depending on soil conditions.
The CD2DRL countersink drill bit is made specifically to perfectly recess this CD2 concrete marker in existing concrete.
CD2 Concrete Marker Installation Instructions