4 Pound Strength Trainer by Momentus Sports:

The MOMENTUS Strength Trainer is a revolutionary training aid designed to create a stronger and more powerful golf swing in just minutes a day!

The patented counter-balanced weighting technology allows you to work out with a heavier golf club for maximum impact while maintaining proper form.

The Momentus Strength Trainer will increase strength and flexibility in the golf-specific muscles. It will add distance to your drives, greater control to your approach shots, confidence to your game, and will lower your scores.

The uniquely weighted design ensures that not only will you be strengthening your golf swing, but also synchronizing the proper hand, arm, and body movements to hit longer and straighter golf shots.