The adjustable dumbbell with a weight range of 5 to 40 kg is an extremely robust and durable piece of training equipment for demanding weight training enthusiasts, with a total of 17 adjustable levels for flexible weight adjustment. The weight is adjusted by turning the adjustment mechanism at both ends of the barbell. This mechanism ensures secure and firm locking to prevent slipping during training. Depending on the direction of rotation and position of the wheel, the weight plates are either added or removed to achieve the desired weight. The ergonomically shaped handle ensures an optimal hand position and reduces strain on the wrists and forearms, while the high-quality materials and robust construction make the dumbbell hard-wearing and resistant to wear and tear. The compact and space-saving design enables efficient training at home or in smaller gyms. The adjustable dumbbell offers versatile training options for different exercises such as bicep curls, tricep presses, shoulder presses, bench presses, rowing, lunges, deadlifts and more. It is ideal for strength training, muscle building, fitness training and rehabilitation. With the variable weight levels, both beginners and advanced users can customise their training and gradually increase the resistance. The adjustable dumbbell up to 40 kg enables a comprehensive and effective full-body workout.