Pair of quick change and lock dumbbells from Ironmaster. 45 lbs each. Go from 2.5 lbs to 45 lbs, and everything inbetween in 2.5 lb increments, on each dumbbell. Comes with 2 handles that weigh 5 lbs each. 4 x locking screws at 2.5 lbs each. 4 x 2.5 lb plates and 12 x 5 lb plates. Email or call Five4one three0one zero1three5.