The DW089K from DeWalt is a self-levelling, ultra bright multi line laser, ideal for a wide range of measuring and levelling applications. Featuring three laser lines for horizontal, vertical and side applications, the DW089K works to an accuracy of to ±0.3 mm/m and surface angle of 4 degrees. Easy to use, with 3 button operation, the DW089K has a magnetic bracket for easy mounting and even comes complete with 4 AA batteries to get you going straight out of the box.