The Spec Ops Box Beam Level with Bungeefeatures a Patented Tourniquet Bungee Systemthat securely mounts the level to plastic pipes, 2x4s and other surfaces. Manufactured with box beam style aluminum construction and then precision milled for elite durability, this level also features three 33% higher visibility epoxy-locked acrylic block vials that deliver an accuracy of 0.0005/inch and offer guaranteed lifetime accuracy. 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 will protect against shock and drops. And with a guarantee to deliver a lifetime of mission capability on the worlds 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 nations heroes by donating 3% of proceeds to veteran and first responder causes.