Hammer Head Rod Butt Cushion - Black. Features:. Attach No. 425 Hammer Head to the end of your fishing rod for ultimate comfort when fighting that fish. More comfortable and easier to use than most fighting belts, with a universal rod butt tube allowing for simple rod to rod transfer. WARNING: This product can expose you to chemicals including Di-isodecyl Phthalate (DIDP) which is known to the State of California to cause reproductive harm. For more information go to P65Warnings.ca.gov.