The multi-purpose wall/ceiling mount bracket attaches with screw to metal surfaces, wood surfaces, and to an angle bracket with clamping mechanism in drop ceiling applications. Use the magnetic L-adapter on select Makita self-leveling lasers to quickly and easily mount the laser to the bracket for stable, precise measuring. A fine adjustment knob allows for more accurate horizontal line adjustment up to 3-7/8”. durable construction of high quality materials gives this mount bracket long life.