The dewalt dw089k is a 3 way self levelling multi line laser used for marking horizontal vertical and side lines with overmoulded housing which helps maintain calibration under jobsite conditions an adjustment dial for fine line movement vertical side with built in magnetic pivot bracket mounts easily on metal surfaces the 3 button operation and low battery indication allows for ease of use and is accurate to 03 mmm in levelling applications with self levelling up to 4 degrees surface angle w