Bosch 5-Point Alignment Laser GPL 5 ACCURACY: The Bosch GPL 5 Five-Point Laser offers a five-point level with points up/down, front and sides for plumb, level, align and 90 square. It provides an accuracy of +/- 1/4 In. at 100 feet MOUNTABLE: The laser tool over-the-track application design accurately transfers and aligns laser points by magnetically mounting to metal. Multi-purpose attachment positions the mount with magnets, strap or threaded mounts (5/8 inch-11, 1/4 inch -20) SMART SYSTEM: With Boschs Smart Pendulum System, the GPL 5 has automatic out-of-level sensing with blinking lasers indicating out-of-level condition. It is self-leveling and locks when switched off COMPACT: The lightweight, compact design allows the laser to go to any job and is ideal for most plumb applications DURABLE: The robust and ergonomic over-molded housing offers water and dust protection to ensure dependable operation and sure grip Class IIa laser product, &lt;1mW power output