Since 1983, StairMaster® has been making a name for ourselves in the gym. Now, we’re making workouts more convenient at home. Our new TwistLock™ Dumbbells let you change weights in 5 lb increments with the simple twist of a handle – no knobs to turn or levers to slide. With weights ranging from 5 to 50 lbs, TwistLock gives you an entire 10-piece set in a single dumbbell – all with a durable construction and a modern, lightweight aluminum cradle. It’s a great way to get a real workout with real results – all from a smart, compact design.