Pair of adjustable dumbbells with quick and easy weight adjustments from 5 to 50 lbs each Quick change weight adjustments with TwistLock technology. Allows you to change weight setting with 1 hand. Set dumbbell in cradle, twist the handle and weight changes quickly and safely. Contoured, textured and soft grip handle design provides comfortable and secure grip control Compact deisgn allows you to store and use dumbbells anywhere while still getting the true dumbbell feel. 2 Year Parts Warranty