the dumbbell have easy adjustable weight set . other brand use dial , this one use a rubberized magnetic pin strap that be very easy and quick to pull in and out . the weight be well make , secure , compact and safe to use . if you be concern about the risk of weight fall of while in use , do not be , this be the best design I have see and it be virtually impossible of that happen . with the 45 lb classic set , you can expand to 60 lb with add-on . if you need more weight than that , then you should choose the elite model , which can go up to 105 lb set with add-on .