Bender Stik Golf Practice System Training Aid Swing Trainer Benderstik. The Benderstik golf training aid is uniquely designed to help you build a consistent golf swing that will last for a lifetime. To improve at golf you must use either positive or negative feedback while training your swing. With the Benderstik golf swing trainer, it doesn"t matter where or when you practice, the Benderstik provide this all-important feedback, which is imperative for improvement.