Introducing the Tube Bending Springs Set, featuring a working area diameter of 3/8-1/2-5/8", providing an array of benefits. The Tube bending springs set 3/8-1/2-5/8" allows for free bending of annealed copper and aluminum pipes, preventing wrinkling of the pipe walls at the bending points. This set is perfect for bending thin soft pipes, as the spring effectively prevents any wrinkling of the pipe walls during the bending process. With its versatile working area diameter, this Tube Bending Springs Set is a must-have tool for any professional or DIY enthusiast working with copper and aluminum pipes.