1. Single Spring Tummy Trimmer allows you to tone and sculpt every muscle group. 2. Single Spring Tummy Trimmer helps to develop Biceps, triceps, shoulders and abs and give proper body workout. 3. The Steel Coil Spring Bar Creates Resistance On Every Pull Making You Work and Perspire More. With Contoured Foot Pedals for Better Grip on Sole and Easy Grip Handles.The Steel Coil Spring Bar Creates Resistance On Every Pull Making You Work and Perspire More. With Contoured Foot Pedals for Better Grip on Sole and Easy Grip Handles. Read Less