The manufacturing process is similar to the creation of regular coiled springs, with the addition of joining the ends together.
Thinner wire and a greater number of coils allow extension springs to be able to contract quickly, which is essential when dealing with pressurized fluids and gases.
They act similar to a bracelet, which is extended to fit around the hand and then snaps back into shape on the wrist.
Heat treating involves placing the spring in an oven at high temperature for a predetermined amount of time, and then letting it cool slowly.
Carbon steel[3] springs tend to have very high yield strengths, and are able to return to their original shape when temporarily deformed.
The close proximity to oil and high-pressure engines mean heat treated garter springs are essential for enduring temperatures over 100 °C (212 °F).
[4] Since they are able to withstand forces from all directions, garter springs are effective at handling changes in volume, pressure, temperature, and viscosity.