Stiffness / Flexibility - “The Feel”
Stiffness and flexibility are inherently related to each other.
Stiffness in more technical terms is called Modulus of Elasticity, which essentially determines the solid feel of your lax shaft.
Lower stiffness creates higher flexibility, and vice versa.
A high stiffness creates more powerful checks while high flexibility creates more impact absorption to keep the ball in your stick when checked and is correlated with added whip on shots and long passes.
Poisonwood is a mid-flex option within the Tomahawk line that compares to a Hickory with much better whip for faster shots and passes and much higher dent resistance for a dent-free shaft.
Overall, Tomahawk lax shafts are significantly stronger than most other woods, so each wood's exceptional flexibility and checking strength are what creates slightly different "feels" when you wind up for a stick check, take a fast shot, and throw a long pass.
Below are the same woods in terms of stiffness/flexibility.
For information on flexibility, see the Compare Shafts page or the Flex Testing page for more details.