Winthrop Terminator Adjusta-ButtsWinthrop Terminator Adjusta Butts are a must have for serious anglers targeting big offshore fish! The beauty of this butt is that with the push of a button it changes from a straight butt ot a curved butt or vice versa. There's no need to have two different butts when the Terminator is an all in one solution. Winthrop Terminator Adjusta Butts are constructed of aircraft aluminum. They have strategically removed material to make them light in weight