Wire sets, plastic tools, what tools bend?
With something that looks like a spring.
There is a tool called spring bender, specially bent PVC wire sets, plastic pipes, sold in the general hardware store, the price is not expensive.
However, each of the different diameter of the wire pipe should be corresponding to the different pipe bender. That is to say, you have to bend several wires with different diameters to buy Pipes with different specifications.
