Bowflex SelectTech 552 Dumbbells (Refurbished) Combines 15 sets of weights into one, using a unique dial system Lets you rapidly switch from one exercise to the next Each dumbbell adjusts from 5 to 52.5 pounds; adjusts in 2.5 lb increments up to the first 25 lbs Say goodbye to 16 dumbbells cluttering your workout space