With four vials, this 12" magnetic torpedo level accurately measures plumb, level, 45° and slope. Its solid aluminum frame is highly durable to survive even the toughest jobsite abuse. It was also designed to be easy and convenient to use - its top-read window lets you view the level vial easily from any angle, and the SurroundView® vials are larger than the competition's at 1/2" diameter, and reflect ambient light, making them exceptionally easy to read. This level also features powerful GripTight™ magnets that hold to flat or round ferrous metal surfaces for convenient, hands-free use, while the V-groove frame fits easily on pipe and conduit.