DEWALT 2 Way Self Levelling Liner Laser LevelThe DEWALT DW088K 2 Way Self Levelling Line Laser is accurate to 0. 3mm m in levelling applications. Self levelling up to 4 surface angle with automatic out of level indication. It uses a simple 2 button operation with a low battery indication for ease of use. The built in magnetic pivot bracket mounts easily on metal surfaces, whilst the over moulded housing and thick glass protects the tool and helps maintain calibration under jobsite conditions.