Sportbell: You will enjoy your workout routine with a product that works as great as looks. The patented turbo-lock technology takes a traditional dumbbell to a whole new level. 10 sets of dumbbells in one neat package. Fast & safe weight changes in one pound increments. Simply slide & rotate the weight plate to lock securely onto the bar . . . no tools, no collars, no pins, and no trays are required for lightning fast weight changes. Sportbell replaces 20 individual dumbbells, making it ECO friendly by using 82% less raw materials than the equivalent 110 pounds of individual dumbbells.