SKLZ Gold Flex Strength and Tempo Trainer! The Gold Flex warm-up and tempo training aid is designed to improve your swing while providing a core muscle workout. The Gold Flex encourages a flatter swing plane and forces the downswing to be initiated by the lower body, both of which fight slices. Features: Durable polyurethane head for frequent use Shaft length helps flatten the swing plane 49" in length, 2.5 lb. head Flexible fiberglass shaft teaches lag and helps eliminate early release/casting Golf grip with guidelines for proper hand placement Head weight improves kinetic sequencing in the swing Strengthens core golf muscles Great low-impact stretch for pre-round warm-up