Bar JackThe Bar Jack is perfect for the single arm athlete. The jack lifts the bar to allow the plates to move on and off without being impeded by the floor. Rated for 600#. Wheelchair users will also benefit. Holding the barbell up and placing weights can be a struggle. Olympic Lifts are hard don't make it harder. Spend your energy on the workout. The Bar Jack is perfect for every athlete. Throw it in your gym bag and enjoy your next barbell workout.