A Non-standard custom shaft is a mechanical component designed and manufactured for a specific application and not following state standards. This type of shaft is often designed with the intention of making a specific product as close to the desired end result as possible. Hence, it is crucial to select a custom shaft manufacturer with proper knowledge and experience in this field.

A shaft's construction and materials are crucial to its performance. The quality of the material will determine the frequency, torque, and weight of the shaft. Although most golfers are unable to feel the difference in specific specifications, it's important to have a good fitter to choose the best shaft for your game.