Each pocket is vacuum heat treated to give it maximum strength and wear resistance. This high durability protects the finger tooth and prevents it from damaging while the grinder is in use. Finger pockets do not need to be removed to change the teeth. Simply loosen the bolt and the tooth will slide out between the wheel and the pocket. This allows for quick and easy replacement and will help to reduce machine downtime. Rotatech heavy duty pockets are recommended for high horsepower stump grinders.