Are ProGrip Dumbbells adjustable?

No. They are fixed-weight dumbbells, so you buy the pairs you need and pick them up as-is. That makes them faster between sets but less space-efficient than an adjustable set.

Will the TPU shell protect my floor?

The TPU cover is softer than bare iron and helps prevent scuffs and chips. It is not a replacement for a rubber mat if you drop weights from height.

No. The anti-roll design keeps them stable on flat floors and racks, so they stay where you set them down.

How do they compare with rubber hex dumbbells?

The TPU shell is more resistant to odor and surface wear, and the anti-roll shape is tidier than a hex head. Hex dumbbells are usually easier to find in a wide range of weights.

Lifters and facilities that want durable, good-looking fixed weights for frequent use. If you need many weights in a small space, adjustable dumbbells suit better.