Nautilus SelectTech Dumbbells

Nested dumbbells are nothing new, but previous models were boxy, bulky, and hampered by workmanlike switching systems that made us feel as if we were opening bridges, not swapping weights. This sleek set adjusts by 2.5-pound increments (up to 25 pounds) and 5-pound increments (from 25 to 55 pounds) with a simple twist of the end caps. Now, if they only made a barbell set . . . $350. source MH