The Klein 89030 Professional 4-in-1 Tube Bender bends four popular soft copper, aluminum, and steel tube sizes. It has calibrated markings for accurate left-hand, right-hand, and offset bends up to 90-Degree. It bends 3/16-Inch, 1/4-Inch, 5/16-Inch and 3/8-Inch (6mm and 8mm) O.D. tubing. Closed Overall Length: 10-Inch. Weight: 1-Pound Safety information: Always wear approved eye protection. Never use on or near live electrical circuits.