Irwin 1794068 Magnetic Box Beam Level 48"Highlights: Length: 48" Thick walled high grade aluminum frame provides extreme durability and resists jobsite wear and tear. Continuous Edge increases level durability ensuring accuracy over time, protects center vial, and allows for continuous scribing. Plumb Site offers dual sided, undistorted viewing in the plumb position and easy, more accurate plumb readings. Over molded rubber end caps provide shock absorption, protecting the level's accuracy