The Spec Ops box beam level with bungee features a patented bungee fastening system that securely mounts the level to plastic pipes, 2 x 4s and other surfaces. Manufactured with box beam-style aluminum construction and then precision milled for elite durability, this level also features three high-visibility epoxy-locked acrylic block vials that deliver an accuracy of 0.0005 in and offer guaranteed lifetime accuracy for plumb, level and 45 deg pitches. The 2% slope lines were also added to help you do more with less. The ergonomic handle is perfect for comfortable all-day use, while the tool-free removable shock-absorbing end caps are perfect for use in tight spaces. And with a guarantee to deliver a lifetime of mission capability on the world's toughest job sites, this level has been drop tested to exceed MIL-STD-810G. Spec Ops tools are backed by our five-star, hassle-free lifetime warranty and with each purchase made, we support our nation's heroes by donating 3% of proceeds to veteran and first responder causes.