Winthrop Adjusta-Butt...Instead of buying two butts, one bent and one straight. We now incorporate both into one design that can switch with a push of a button. During the battle you can go from straight butt to bent butt, with a push of a button you can go from straight to bent or back from bent to straight. When the fish is going straight away from you, the butt should be in the straight position. When fish goes for his death circle and you need to pull him up, you can got to the bent position which allows the angler to put more force on the fish, keeping your back nice and straight. Adjustable hoods for 30 wide and up to a 130 wide. The derlin collar nut is designed so it will not come loose.