Fast Adjust Weight Dumbbell design with a concise and clear dial, which is helpful shorten the time for changing weight between groups during training. There is 5 weights choice in adjustable dumbbell: 5 lb, 10 lb, 15 lb, 20 lb, 25 lb. Fast Adjust Weight Dumbbell: Concise surface, printed with clear scales, 5 pounds, 10 pounds, 15 pounds, 20 pounds, 25 pounds. The adjustment scale is very smooth and feels good, just like turning the lock of a safe, you can feel the texture. High-Precision Silicon Steel Sheet: With frosted coating design, wear resistance, strong corrosion-resistance, no rust. Customized lock design dumbbells and keep it safe and will not drop while using.