Whether youre putting up shelves fitting curtain rails or just getting pictures straight on the wall the bosch pll 1 p laser level pen makes the alignment of objects a straight forward and simple task with a laser line projected out one end and a laser point out the other you can even use the laser level pen for transferring heights from one wall to another the pll 1 p also has a high level of laser accuracy with a leniency of 0 5 mmm