Pre-owned but in working condition. Unit points up/down and front to add squaring to plumb, level and align capabilities One-person does the job of two people using manual plumb bob In-track design makes unit easy to move, maintains right height Multi-purpose mounting attachment allows unit to be used virtually anywhere Integrated reference lines – for precise positioning of tool and transfer of points Pocket-sized – only 4-1/8 In. (105 mm) tall; pouch fits on tool belt Easy access battery compartment Easy field recalibration – maintains accuracy and prevents downtime