• Ultra-wide ab roller with built-in resistance and ergonomic handles to help maximize results of ab roll-out exercises
• Interior kinetic engine uses a carbon steel spring to provide resistance and amplify abdominal and arm workout
• Ultra-wide wheel tread offers stability when carving left, right or center for targeted work on obliques
• Ergonomic hand grips are angled to activate arm and core muscles; handles are removable for easy storage and transport