PowerBlock

PowerBlock is an American manufacturer based in Minnesota that has specialized in adjustable dumbbells for decades. Its products are easy to recognize by their squared-off block shape with a selector pin instead of round weight plates.

The lineup includes adjustable dumbbells in several series, expansion kits for heavier weights, and matching dumbbell stands. The weight is selected by moving a pin within the nested stack of plates — no screw collars or loose discs required.