Bosch pll line laserlaser level bosch diy 0603663001 this line laser from bosch is an ideal companion for the professional tradesman looking for a perfectly levelled horizontal 360deg line accurate and error free alignment of objects in the entire room the laser has been manufactured to a high standard and is equipped with a host of excellent features including the lock function allowing a projection of diagonal lines at any angle other features and benefits includeautomatic self le