What is a pipe bending spring?
A pipe bending spring is a strong, flexible spring that is inserted into (or over) a pipe to support the walls of the pipe when manually bending.
What are the different parts?
A pipe bending spring doesn't have parts as such, but it does typically have some features worth noting.
Most models of internal pipe bending spring will have a ring on one end so that a piece of wire or string can be attached to it.
This makes retrieving the spring after each use much easier.
Tapered end - Internal
The tapered end of an internal bending spring is slightly thinner, allowing you to feed it into the pipe with ease.
Tapered end - External
On an external bending spring, the tapered end is wider making it easier for you to insert the pipe inside. (Note that you don't need a ring end on an external pipe bending spring)