The magnetic location equipment is engineered by the most experienced design and manufacturing team available in the nation today. ML-1M additionally features a digital meter that provides for visual signal strength, polarity indication, gain setting plus battery life display. These versions are engineered to operate identically with the same controls. The metered model (ML-1M) adds features without adding complexity. Use this equipment to find: Corner markers (iron or steel), Mag nails and PK nails, Valve and curb boxes, Iron and steel pipes, Well casings, Manhold & Utility Box Covers, Steel drums & tanks, Septic tank handles, Energized electric cables, Marker magnets, Unexploded bombs (UXO).