About the productDescriptionDetailsVersatile Training: This 4-in-1 set transforms into dumbbells, barbells, kettlebells, and push-up stands, supporting diverse exercises like bench presses and squats.Durable Construction: Dumbbell pieces feature a high-quality PE exterior and an interior blend of iron, mud, and sand, preventing floor abrasion.Comfortable Bar: The connecting rod includes a 5mm steel tube and 20mm thick foam, with a curved, non-slip, and sweat-absorbing design for comfort.Secure Grip: The dumbbell bar has an ABS environmental material surface with a non-slip texture, enhancing friction for better control during workouts.Enhanced Safety: Four safety nuts with thickened threads securely hold dumbbell pieces, preventing movement and ensuring user safety.