Professional 4-in-1 Tube Bender Klein Tools 89030 None Imported Bends four popular tube sizes Calibrated markings for accurate left-hand, right-hand, and offset bends up to 90-degrees For soft copper, aluminum, and steel tubing Bends 3/16-Inch (5 mm), 1/4-Inch (6 mm), 5/16-Inch (8 mm) and 3/8-Inch (10 mm) O.D. tubing Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.