Ideal for hanging shelves, pictures. mirrors, aligning panels, tiles, and wall coverings. Highly visible line laser with two easy-to-read vials - horizontal and vertical. Patented rubber grip holds any size nail/screw. Pressure-activated on/off button on rear when held to flat surface. Accuracy: 0.5°/in. at 20' (1mm/5M). Laser range up to 6M. Uses 2 x AAA batteries (supplied). Manufactured for Draper Tools by Kapro. A handy wristband is available to hold nails whilst working (Stock No. 40960). Display packed.