The Dewalt DW088K Self-Leveling Line Laser is great for cabinet installation, chair rail installation, electrical outlet installation, interior trim carpentry and acoustical/drop ceilings. It includes a build-in magnetic pivot bracket that mount easily on metal surfaces. The overmolded housing helps maintain calibration under jobsite conditions. It is a 1-button operation and control panel for ease of use. The DW087K includes: self-levelling laser line, (3) AA batteries for 20+ hours run-time and kit box.