The Spec Ops Tourniquet Level features a Patented Bungee System that securely mounts the level to dimensional lumber upto 2"x8", plastic pipes and other surfacess. Precision milled, high-strength aluminum, box beam construction for elite durability. Featuring 33% larger high-contrast green vials with 2% slope lines for maximum low-light visibility and speed. Match grade, epoxy-locked 360° solid acrylic block vials deliver .0005"/inch for guaranteed lifetime accuracy. The chamfered spine is built for strength and ease of use, while the tool-free, removable, shock-absorbing end caps will protect against drops and hard-use. 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. We support our nation's heroes by donating 3% of proceeds to veteran and first responder causes.