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. Retractable end caps allow for scribing into and through corners, increasing work efficiency. Thick-walled high-grade aluminum frame provides extreme durability. Features rare earth magnets which are 5 times stronger than strip magnets and allow for easy, hands-free steel construction work.