PREMIUM MATERIALS - This product is made of high strength spring steel and can be used to bend copper and aluminum tubes. Easy to use and durable. Whether you are a new worker or a professional maintenance person, you can easily operate this product. 5 SIZES - There are 5 different sizes of pipe benders in this 5-piece set for 6mm, 8mm, 10mm, 12mm, 16mm copper pipes and can handle a variety of different situations to meet All your needs. Super Elasticity - This product can bend the tube 180 degrees, and the super elastic force will not deform. It is suitable for all kinds of soft copper pipes and can meet various needs in the maintenance process. Wide range of application: This spring pipe bender can be used for copper pipes, aluminum pipes, thin-walled steel pipes, etc. For better results, we recommend using a pipe bender on the pipe and another pipe bender inside the pipe. High-density steel ring, high hardness, good toughness, arbitrary bending, convenient and fast, good effect, effectively avoid bending damage to the copper tube.