Speed Abs by Iron Gym is the only ab machine that provides superior resistance (as you roll out) and assistance (as you roll in) while you sculpt, tone, and strengthen your whole upper body. Its’ pro-grip handles are a special high performance ergonomic, rubberized design that helps minimize hand fatigue by keeping you in your natural position to prevent slippage while maximizing stability, control and comfort so you can optimize your abdominal workout and go for longer! The durable, ultra wide non-skid ab exercise wheel with built-in steel coil provides enhanced resistance as you extend and roll out to take your abdominal exercises to the extreme, then helps guide and assist you back in a fluid, controlled manner so you really feel the burn!