● Weights Change in 1-Second: dumbbell adjusts from 5kg to 25kg without disassembly; One-handed operation design, easier for fast-changing in 5kg increments(5kg/10kg/15kg/20kg/25kg).● Super 5 in 1 Structure: it's adjustable 5 in 1 dumbbell, which are equivalent to five traditional dumbbells, which saves you money and can also achieve better training goal.● Innovation Bionics Technology: the grip is made of high-strength nylon material and Silicon Steel. With non-slip frosted treatment, the Hand Weight can improve friction in all directions.● Weights Set for Home Gym: easily train the whole body muscles, with a variety of training methods, suitable for men and women. Effectively provide help for those who love home gym fitness.● Spacesaving Design: each set of dumbbells has an exclusive high-density base to prevent the dumbbells from directly touching the ground. Not only protect the dumbbells, but also prevent hitting the floor.● Two colors for choice, Red dumbbell bring you more passion. And black dumbbell bring you more cool style.● Weight Dialing System This adjustable dumbbell are using Weight Dialing System for fast changing weight block. Only a single hand could rotate the anti-slip handle bar, once you hear a "CLICK", the weight is changed by no more than 1 second. The whole piece combines 5kg-10kg-15kg-20kg-25kg into one set.Double Lock for Safe, this adjustable dumbbell also weidly uses Double Lock system for safely using. It could avoid weight block dropping to hurt your body.● Visual Dial PlateThere is an outstanding dial plate on the tray of the adjustable dumbbell. It could help you double confirm the weight you will choose. And for exercise talents, we can start step by step.● Silicon Steel SheetThe weight blocks are made of Silicon Steel Sheet. After machining & powder coating, the block set becomes more smooth, and anti-rust.