This Wonder Core hand grip strengthens your hand grip, tightens arm muscles and has an adjustable resistance of between 10 and 40 kg. This can be easily adjusted with the resistance knob.

Do you want better looking arm muscles and more grip in your hand? With the Wonder Core hand exerciser you can create that in no time! This fitness accessory helps you to strengthen your hand grip with the additional result that the arm muscles look tighter.

The hand trainer can also help with painful hands or stiff fingers.