Pinroyal 4 in 1 Adjustable Dumbbell Set Replace your dumbbells, barbells, and kettlebells with a single Pinroyal 4 in 1 Adjustable Dumbbell Set ($300). It has a maximum weight of 88 pounds, so the workout options are endless. Image Source: amazon.com Pinroyal 4 in 1 Adjustable Dumbbell Set $300 from amazon.com Buy Now