The ALH Self-Leveling Rotary Laser is made specifically for exterior leveling applications such as concrete forms, earth leveling, and excavation. The ALH is accurate up to 1/16-in. with a range of 2800 ft. in diameter with a laser detector. The ALH offers manual single-slope capability and has an IP67 rating. The laser is available in multiple kit configurations. CST/Berger. 800-435-1859.