Bosch Two-Point Laser GPL 2 ACCURACY: The Bosch GPL 2 Two-Point Laser offers a two-point plumb projection to accurately transfer points from floor to ceiling eliminating the need for a plumb bob. It provides 1/8 in. accuracy up to 30 feet for up and down plumb applications. 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 2 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 II laser product, &lt;1mW power output