Bowflex dumbbells, particularly the SelectTech series, are adjustable dumbbells designed for convenience and space efficiency. They allow users to switch between different weights quickly by simply turning a dial, with options ranging from 5 to 52.5 lbs (SelectTech 552) or 10 to 90 lbs (SelectTech 1090). This eliminates the need for multiple sets of traditional dumbbells, making them ... https://activefitnessstore.com/bowflex-selecttech-5-52lb-dumbbells-ntbx-100182