Use a Dunham and Morrow Magnetic Locator for the fastest and easiest way to locate rebar survey markers, buried septic tank lids, underground iron water and gas pipes, water valves, water meters and any other ferrous object buried under dirt, asphalt, water snow or ice. These products are also known as utility locators, surveying pin locators, property corner location equipment, and mag locators. EngineerSupply is a Factory Authorized Dunham & Morrow Dealer.