Contour to wrist or ankle. Securing system includes 14" (36cm) hook-and-loop strap with a double safety closure to assure easy adjustment and secure fit even during strenuous exercise programs. All but the two largest (15 and 20 lb [6.8 and 9.07 kg]) are grommeted for storage on weight rack. Weights are filled with lead-free steel shots. See pages 698-702 for weight cuff racks.