SKLZ' best selling golf swing trainer improves swing tempo, strength, and flexibility. It's a favorite of many golf pro's for warming up and tempo training. FEATURES 10-20 swings every day will improve swing tempo, strength, and flexibility Easy to use - simply “swing” the Gold Flex back and forth continually without stopping at impact position, as if swinging to a metronome Fights slices and flattens the swing Low-impact stretch for pre- round warm-up Fits easily in golf bag – legal to carry on course SKLZ best selling golf swing trainer