IKEFLY Trainer Kit Training Straps Bodyweight Resistance Training System Home Gym Fitness Trainer, Outdoor and Indoor, Professional Fitness Super Sturdy Training Straps for Full-Body Workout Exercise Great to blast your back, Swivels Up, Down, and Side to Side. Look closely at this unit, it's better than you think. Works your back, abs, arms, shoulders. A complete total body core cardio cossfit workout. Attaches to a 2" or 2 1/2" tubing squat power rack or bench, mount to floor or wall. Black Heavy duty, versatile, compact, affordable. Bushings for a smooth movement, steel for durability. Use with either Olympic or Standard bars. See comparison below and in pics to basic models.