Amazon's Gold Box Deal of the Day is this Universal Power-Pak 445 Adjustable Dumbbells with Stand (Combo)! Offering an ideal combination of performance and space-saving ingenuity, the Universal Power-Pak 445 adjustable dumbbells with stand are a great choice for athletes and beginning weight trainers. The Power-Pak dumbbells, which adjust from 4 to 45 pounds in 5-pound increments, work just like a weight stack at the gym. This is originally $449.00, but it's on sale today for only $199.99!! That's a savings of $249.01 (55%!).