Features and Benefits:�270 degrees of vial visibility�Non-removable thumb screw�Machined surfaces help prevent dog-legs�Compact sizeMilwaukee'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.