Patented Tourniquet Bungee System for hands-free leveling on pipes, 2x4s and other surfaces 33% higher visibility, epoxy locked vials features 2% slope lines or 1/4" pitch and an accuracy of 0.0005”/1”, and a 45° pitch vial Die-cast aluminum body constructed for ultimate durability Invertible vial allows for accurate reading upside down using the milled surface V-grooved bottom with integrated rare earth magnets securely grips pipe, conduit and metal surfaces Drop-tested to exceed MIL-STD-810G to ensure durability on the toughest job sites Limited lifetime warranty