【Desired Curves】Flexible steel spring tubing benders are designed for bending thin-wall tubing, copper and soft metals to the percise angle (up to 180 degrees) without crimping or collapsing the pipes. 【Suitable Size】Suitable for 1/4, 5/16, 3/8, 1/2, and 5/8 inch O.D.tubings.Most common use pipes sizes in the daily life. 【Durable Material】The kit adopts a durable oil hardened and tempered spring steel with a zinc-plated finish.Makes the spring solid and durable. 【Easy to Use】 Flared end makes sliding tubing in easier.Springs back to original shape after use.Simple operation and get what your want perfectly.Zinc plated help you clean it easily and not tend to rust no matter indoor or outdoor. 【General Recommends】For a better result,using one bender over the tube and an additional bender inside the tube.