This two-point laser unit transfers point from floor to ceiling for fast, accurate layouts; accuracy is +/- 1/8'' at 30'. Smart Pendulum System self-levels, indicates out-of-level condition and locks when switched off. Compact design allows the unit to go anywhere and can be used in almost any interior application. Multi-purpose attachment positions the mount with magnets, strap or threaded mounts (5/8''to 11, 1/4'' to 20). One-person does the job of two people using manual plumb bob. Over-the-Track application design accurately transfers and aligns points by magnetically mounting to metal surfaces.