The GL412N (single grade) lasers send a continuous, self-leveled 360-degree laser reference over your entire work area, and have a wide grade range so they can be used in a variety of slope applications.
GL422N (dual grade) lasers send a continuous, self-leveled 360-degree laser reference over your entire work area, and have a wide grade range so they can be used in a variety of slope applications.
The economical, easy to use GL720 features 10% in the X axis grade range and -0.5 to +25% Y-axis grade range with high accuracy up to 900 meters (3,000 feet) diameters. The GL720 is ideal for general construction and machine control grade applications