What are the advantages of hexagonal dumbbells compared with ordinary dumbbells?

The reason for hex rubber dumbbells the design is that round-headed dumbbells are easy to roll and will go a long way on the floor mat at the gym. So that's where this comes from
Kind of design. fitness
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Now let's analyze the difference between hex rubber dumbbells and round head dumbbells. Issues related to
Hexagonal dumbbells are a great advantage when doing dumbbell-related exercises. 
Gym girl
hex rubber dumbbells have a greater area of contact with the floor than dumbbells with round heads. So it's more stable
You can practice dumbbells

Especially in the dumbbell push-ups, dumbbell push-ups single arm rowing, hexagonal dumbbell than round head dumbbell has a great advantage of buying dumbbell
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CrossFit, a high-intensity fitness activity, also uses hex rubber dumbbells. 
The downside is that if hex rubber dumbbells hits your foot in free fall, the pain is even deeper.