Tube Bending Spring Set, 4 pack (1/4 in., 3/8 in., 1/2 in., and 5/8 in.)Easily makes bends of soft tubing. Will bend copper and aluminum up to 180. Also good for bending air condition tubing. Bends copper and soft metals into desired curves Four sizes 1 4 in., 3 8 in., 1 2 in. and 5 8 in. Flexible spring steel slides over tubing Flared end makes sliding tubing in easier Springs back to original shape after use A set of tools every plumber should own For further dimensional information, please see the line drawing Features