GOL26 CK Bosch Automatic Optical Level Kit GOL26 CK Bosch Automatic Optical Level Kit features a large aperture 26x-power lens allowing more light for sharper image/magnification and self-leveling compensator with transport lock which protects the pendulum against damage or loss of calibration. GOL26 CK Bosch Automatic Optical Level Kit features both horizontal/vertical cross hairs and Stadia lines which measure levels, alignment and estimates distance. GOL26 CK Bosch Automatic Optical Level Kit includes screws which provide stability in all weather for precision leveling, a top mount quick site for quick sighting of leveling rod and a Circular Bubble Vial with 90° prism for easy and fast setup.