Competition / Professional Grade KettlebellsKettlebells are the world's single most effective tool for MASSIVE gains in STRENGTH, SPEED and ATHLETIC ENDURANCE!Kettlebells are more and more popular in the world. These Pro-Grade kettlebells are ergonomically designed by Russia's leading kettlebells lifters and coaches. they are used by professional kettlebells athletes world wide in all international kettlebell competitions. So, these pro-grade kettlebells are also named as Competition Kettlebells.The competition kettlebells are in the same dimensions throughout the range 8, 12, 16, 20, 24, 28, 32, 40, 48kg. Therefore there is no need to change technique when moving between weights. Made from steel. The whole body and handles are all steel.