Ativafit Adjustable Dumbbell If you're worried the weight might readjust on you in the middle of your workout, this Ativafit Adjustable Dumbbell ($100) will definitely put your mind at ease. It has a max of 27.5 pounds, but there's no chance of accidentally turning the dial or handle because the weight can only be adjusted with a push-and-pull function that audibly clicks in place when secure. Image Source: amazon.com Ativafit Adjustable Dumbbell $100 from amazon.com Buy Now