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The dumbbell is the most popular sports equipment. But it makes a male impression, like a lump of metal. It is absolutely emotionless and unpleasant. Moreover, it often scratches the floor and its own body. From economic point of view it is a large disadvantage.
With the rubber protection ring Colourfit protects itself and the floor, which extends the product life span. You can plan oneself its own colors to your taste and weight, it create an individual look and the pleasure of sports.
It has also simple and innovative safety device concept. So you needs neither specially screw nor mechanical device.