Dual-chamber design increases level durability, ensuring accuracy over time, and resists twisting twice more than traditional I-beams. Plumb Site offers dual-sided, undistorted viewing in the plumb position and easy, more accurate plumb readings. MagnaVials and wide top read window provide easy, accurate readings. Rare earth magnets are 5 times stronger than strip magnets and allow for easy, hands-free steel construction work. IRWIN Tools 1550 Magnetic I-Beam Level

• Dual-chamber design increases level durability, ensuring accuracy over time, and resists twisting twice more than traditional I-beams.