Five-Point Self-Leveling Alignment Laser: Five-point level with points up/down, front and sides for plumb, level, align and 90? square; accuracy is +/- 1/4 In. at 100 Ft. Eliminates the need for 3-4-5 In. measurements in laying out a 90? angle. 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 In. to 11, 1/4 In. to 20).