These are the Spherebell Dumbbells Kettlebells from Power Guidance: they are designed to mimic Thompson dumbbells. They feature a wide handle to let you perform cleans and snatches without putting unnecessary stress on your body. The Spherebell also works as a kettlebell with a side grip.
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You can not only use these for strength training but also to improve your punches. The 10kg version has a footprint of 17cm to 21cm.
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