This is the mast for someone who is really pushing the limits and wants ultimate strength and lightweight performance. Fiberspar engineering and greater wall thickness mean more impact resistance and durability. The Radius RDM has the right flex curve to match existing and future sail designs. The Radius is supplied with special RDM adaptors to match most booms and mast extensions. Some sailors choose the Radius RDM simply because it is so easy to grab in water starts, jibes, and transitions!