The PrimeOz 30 KG Adjustable Dumbbells, Barbell & Kettlebell Set features durable PE-coated plates, solid iron rods, and versatile kettlebell handles, offering a complete strength training solution. Here are the set inclusions and material details for the PrimeOz 30 KG Adjustable Dumbbells, Barbell & Kettlebell Set: Set Includes: Weight Plates: 1kg x 8 pcs 2kg x 4 pcs 2.5kg x 4 pcs Dumbbell Bars: 45 cm solid chrome bar with rubber handle x 2 pcs Connector Bar: 39.5 cm foam chrome connector bar x 1 pc (for converting dumbbells into a barbell) Collars: Star collars x 4 pcs (for securing weights) Kettlebell Handles: 2 pcs (convert plates into a kettlebell) Kettlebell Base: 1 pc (for stability and support) Material Details: Weight Plates: PE (Polyethylene) coated for durability and protection against wear and tear. Dumbbell Bars: Made of solid iron with a chrome finish for strength, durability, and corrosion resistance. Connector Bar: Foam-coated chrome bar for a comfortable grip and easy conversion between dumbbell and barbell. Collars: Star collars designed to securely hold the weight plates in place during workouts. Kettlebell Handles: Made of durable material designed to attach securely to the weight plates for versatile kettlebell exercises. Kettlebell Base: Sturdy construction to provide stability and balance when using the kettlebell.