Abstract: An arrow head having two different movable blades with at least one blade interchangeably mounted in a pivotal or a fixed position with respect to a blade carrying body and a second blade that moves between a flight position and an impact position. A shaft is used to retain a corresponding blade in a pivotal or a fixed position with respect to a blade carrying body. When the blade is pivotally mounted, a bias force of a retaining member is preferably selected so that each blade remains in a normally closed position during flight of the arrow head and can quickly move to a fully open position upon impact or when a sufficient opening force is applied to the arrow head.

Abstract: A lighted nock and a method for operating the lighted nock. A nock body has a shaft extending from the nock body. The nock body can form a nock cavity and a light source can be positioned within the nock cavity. A ferrule can form a ferrule cavity. A power source can be at least partially housed within the ferrule cavity and at least partially housed within the nock cavity. The shaft can at least partially be mounted within the ferrule cavity. A bias element can be mounted between the light source and the power source. The lighted nock can be switched between an on condition and an off condition.

Abstract: A lighted nock and a method for operating the lighted nock. A nock body has a shaft extending from the nock body. The nock body can form a nock cavity and a light source can be positioned within the nock cavity. A ferrule can form a ferrule cavity. A power source can be at least partially housed within the ferrule cavity and at least partially housed within the nock cavity. The shaft can at least partially be mounted within the ferrule cavity. A bias element can be mounted between the light source and the power source. The lighted nock can be switched between an on condition and an off condition.