The Rock Hard MAGNail has become the chosen nail among surveyors worldwide. It out performs any survey nail, period!
MAGNails are magnetized for a 2-4 times greater detection with a metal locator. Revolutionary new metal formula retains magnetism. Larger center point and head (9/16") makes nail easier to use. In addition to the larger center point, elasticity was incorporated into the Magnail. If magnail drifts off a little you can straighten it back up without worry of it breaking off. Magnails come 100 count per box.