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. Overmolded rubber end caps provide shock-absorption, and are removable for accurate leveling into corners. Thick-walled high-grade aluminum frame provides extreme durability.