Kettlebells are finally gaining traction outside of Eastern Europe. Nowadays, men in gyms across America are using them in their daily routine. But it can still be tricky to figure out when you should swap your dumbbells or barbells for a kettlebell. So we asked kettlebell pioneer and StrongFirst.com chairman Pavel Tsatsouline for two exercises that are better with a kettlebell in your hand. Master them to start building more strength and blasting more fat.