Used Harbinger AB Carver Pro W Knee Pads Ab Roller Exercise Wheel Black 3 Military Grade Composite Fortified with black yellow Military Grade Composite Fortified with Kevlar moisture wicking and compressive so you can focus on the game 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