EASY READ VIALS: The heavy-duty level has oversized vials with 1/2 in. vials that offer maximum visibility; making the readings easy to read. QUALITY CONSTRUCTION: The non-magnetic level features a heavy-duty aluminum frame that promises to withstand the harsh impacts at the job site; delivering unparalleled performance. SECURE GRIP: The Heavy-Duty Aluminum Box Level has an ergonomic handgrip that provides a comfortable and secure grip throughout the task. It also features non-slip removable end caps designed for finishing carpentry work. ACCURATE READINGS: The plumb level features SurroundView vials that reflect ambient light. This makes reading in dark or dim-lit areas convenient and accurate. SMART DESIGN: The 72 in. aluminum box level has a top-read window that maximizes readability; allowing you to access reading from any angle. It has a rubberized handgrip that provides a comfortable and secure grip throughout the work.