Trulap are the world's most compact adjustable dumbbells merging 52 dumbbells into 1 set! Seamlessly transition from 8.5 to 52lb / 4 to 23.5kg  with a simple twist of the wrist, our dumbbell empowers you to precisely target each muscle group for a full body works out from anywhere you desire. Specs & Warranty Dumbbell Dimensions:  As you decrease the weight, the dumbbell's frame becomes shorter, offering a comfortable and stable workout experience. The handle is expertly remastered with a volcano knurling and 34mm handle diameter that gives a natural barbell feel.