Milwaukee-48-22-5001 Pipe Lock Level Milwaukee's Pipe Lock Level is the ideal solution to prevent dog legs in conduit when making multiple bends. It features a best in-class 270 degrees of vial visibility, making it the easiest conduit level to read. The Non-Removable Thumb Screw features an e-Clip which prevents the thumb screw from getting lost, and the three machined surfaces give you an accurate lock onto conduit, aiding in preventing dog legs.