Rocketlok 100-Pound Adjustable Dumbbells (Pack of 2) Each dumbbell adjusts from 15 to 50 pounds in 2.5 pound increments in just seconds allowing rapid transition from one exercise to the next Dumbbells lock up tight with no rattling or looseness Combines 15 sets of weights with one handle Dumbbell dimensions are just 6.5" x 6.5" x 14.5" long at the 50lb size and just 9" long at 15lbs size. Handle grip diameter is 1.25" and there is 6.5" grip width inside Our advantage over other variable weight dumbbell systems, we can place all the extra weights on to one single handle to create an 85 pound dumbbell. (15 pound handle 70 pound of add on weights)