The Empire 9 in. Magnetic Polycast torpedo level features durable Nn-conductive Polycast construction that insulates from heat, cold, and electricity. A magnetic edge provides strong holding force and durable acrylic vials provide plumb, level, and 45 degree readings that are accurate up to.001 in. The level is weather resistant for long-lasting use and resists marring or scratching the furniture or surfaces you work with.