The Ab Trainer Club Pro is the “heavy-duty” club version of this immensely popular abdominal workout. It is the perfect compact abdominal trainer that can fit anywhere. The new model includes the Ab Trainer only and accepts your own add on weight plates with 1″ diameter holes. (SOLD SEPARATELY) Includes spring collars to hold weights on securely. The Ab Trainer Club Pro’s rocking action perfectly replicates spinal flexion while completely supporting the head and neck.Manufactured with heavy duty steel tubing and wear-resistant vinyl pads, the Club Pro is built to last.