Adjustable Dumbbells Set Free Weight Set with Connector, 2 or 3 in 1 Dumbbells 20lb 2-in-1 Multifunctional: Combines dumbbells and barbells. Adjustable Weights: 20/30/40/60/80lbs options. Versatile Use: Suitable for bench presses, squats, and various fitness exercises. Home Professional Use: Ideal for both home gyms and professional settings. Sturdy Construction: Interior mix of iron, clay, and sand. Durable Exterior: High-quality polyethylene material. Odorless Material: Prevents unpleasant smells. Floor Protection: Prevents wear and tear on floors. Cutout Grippable Design: Easy one-handed gripping of weight plates. Enhanced Stability: Cutout design improves workout safety. Quick Weight Adjustments: Easy weight changes with detachable design. Adjustable Dumbbell Weight: 4lbs to 10lbs per dumbbell. Seamless Exercise Transitions: Simple weight adjustments for various workouts. Comfortable Connecting Rod: 5mm thick steel and 20mm thick high-quality foam. Curved Neck Fit: Comfortable design for neck support. Non-Slip and Sweat-Absorbing: Enhances comfort and safety. Non-Slip Dumbbell Bars: ABS environmentally friendly material with non-slip texture. Enhanced Hand Grip: Improves control during workouts. High-Quality Safety Double Nuts: Four safety double nuts included. Thickened Threads: Securely holds weight plates. Prevents Movement/Shaking: Double nuts design ensures stability. Stable Exercise Experience: Enhances safety during workouts