Overview Reviews Product Description 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.Irwin tools 1500 i-beam level, 48-inch (1794107). Irwin Tools Catalog Product Videos Custom Field Manufacturing country CN Product Reviews Write a Review Write a Review × Irwin 48" 1500 Series I-Beam Level 1794107 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *