Dual Benefits: Our waist twister board is equipped with a counterbalance plate, precision ball bearings and foot massage blocks, enjoy a foot massage to promote blood circulation and enhance the workout effect while using the waist twisting machine Adjustable Waist Twister: Adjust the resistance according to your own twisting amplitude, larger amplitudes result in higher resistance, suitable for all stages of training to achieve a slimmer waist and toned abs. Comes with elastic cord to enhance balance and stability and increase pulling resistance when twisting Sturdy and Durable: Unlike other plastic waist twisting exercise machine, our waist twister is made of high quality carbon steel material and durable ABS material, triangular structure is solid and non-slip, with a maximum load capacity of 300lb Smooth and Silent: Built-in silent track, you can use the ab twister board twist at home as you like without worrying about disturbing others. Built-in high-speed bearings in the sliding mechanism to ensure smooth twisting Compact Size: Our waist twisting fitness tool is the perfect addition to your home gym. Twist exercise machine helps to exercise abs, lower back and core. Small size and easy to store. Product Size: 20.8"L x 13"W x 4.5"H.