Power Systems Versa Cuff, 2 Padded Cuffs with Resistance Tubes for Wrists and Ankles Works more of the muscles in your body 12 inches long Padded cuffs with adjustable Velcro closures 6 color coded resistance levels (sold separately) Resistance exercise training aid for speed, agility, strength, power, running, football, basketball, baseball, soccer and all other athletic, fitness, weight, or cross training