Aluminum frame for superior accuracy and durability, Three vials read plumb, level and cross check, Built-in, rotating head swivels projects laser dot, horizontal or vertical lines, V-grooved bottom surface for use on pipe or conduit, Leveling base included, 40-6174 Includes > Laser, base (leveling bracket), 2 "AA" alkaline batteries, two mounting straps, instruction manual with warranty card, soft-sided pouch