Perfect Fitness 311076 AB Carver Pro Ultrawide Wheel – Black, Size 1

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
Includes high-density foam kneepad for superior comfort; downloadable 21-day workout plan; 1-year manufacturer warranty