Projecting bright crossing horizontal and vertical lines 2 with self leveling beams, The Dewalt DW0822 Plum/Cross Line Laser provides accurate plumb point transfer. With an integrated magnetic pivoting base with ¼" thread front and rear mounted magnets, this allows flush attachment to metal tracks and steel surfaces. This device projects a down beam with raised clearance providing dot visibility and alignment for wall track layout. The full-time pulse mode allows use with detector and therefore maintains full brightness for visibility. The locking pendulum is to help prevent damage to internal components if dropped or knocked etc. Features a durable design with over-moulded housing and IP54 water/debris resistance. This helps to protect against the elements on those tough job sites.