Exercising with weights improves core strength, function movement, overall muscle tone and flexibility. The weights will help obtain shape and definition in your upper body; arms, shoulders and back. They will also help increase the effectiveness of your cardio workout. Bumper guards provide protection for surfaces Set includes: 2 x 0.68kg dumbbells. 2 x 1.13kg dumbbells. 2 x 2.27kg dumbbells.