... . Build fat-burning muscle fast. You'll have all the weights you need in one set of Bowflex 552 Dumbbells2. Adjust ... .5 lb (1.13 kg) increments (up to the first 25 lbs) (11.3 kg) so you can gradually increase your strength ... .5, 10, 12.5, 15, 17.5, 20, 22.5,25, 30, 35, 40, 45, 50,52.5 LBS4. One of ...