Abstract: The present invention relates to a hollow knob for a sport item, for example, a bat, a golf club, or a racket, which has four flexible fingers. Each finger has an inclined peg formed on an exterior surface of each finger, such that when the knob is slid into an end of a sport item handle, each inclined peg becomes captive of a corresponding hole in the handle. When an insert is slid into a hollow area of the knob, where a ramp is formed near the top end of the interior of each finger, the knob becomes secured to the handle. An adhesive may then be applied to this assembly in order to prevent tampering of the handle by requiring destruction of the assembly.