The Human Trainer’s patented design features the Modular Clipping System. The D-Ring Quick Clips found on the Modular Clipping System give you five clip-options that make switching between certain exercises rapid and effortless. These multiple, clip options will make your workout more time efficient and allow you to keep your heart rate up. When working out in more confined environments (such as a narrow hallway), you may find it beneficial to clip to a higher D-Ring in order to allow you to workout in a smaller area. By clipping to a higher D-Ring, you will remain closer to your Anchor Points while exercising.