15kg Dumbbell Weights, are a simple and effective way to strengthen and tone the entire body. Versatile you can use dumbbells as free weights or incorporate them into Crossfit or Circuit Training to further engage the muscles, boost endurance and raise the heart rate. Durable vinyl construction with flat edge to stop roll Disc also have cutouts so each disc can be used independently as a freeweight. Includes a third bar that connects and extends the dumbbells into a barbell. Set includes: 4 x 1kg Weights. 4 x 2.5kg Black Weights.les. 1 x connecting bar. 4 x collars. Suitable for full body workouts. 15kg Total Weight Set.