Dewalt 3 Beam Line Laser Green noise canceling earmuffs Super Speed Tip (SST) Core Size:1 3 16" x 1 1 2" (20.6 mm) Super Speed Tip (SST) Core Cutters are made with state of the art surface treatment technology that removes porosity during the fabrication process and is large enough to accommodate the DCB615 battery (battery sold separately) It includes a single lever power switch that locks the pendulum in the off position for added durability and the built in magnetic pivoting bracket mounts easily on metal surfaces The Dewalt 3 Beam Green Laser offers the same great features of our Dewalt Self Leveling 3 Beam Red Laser Pointer in a high visibility green beam