Grip strengthening device: Get a hand muscle and grip strengthening tool. Improve grip: Use the tool for extra gripping support, to strengthen hand muscles, alleviate fatigue or maintain blood circulation. Weight: 300g. Adjustable: Easily adjust between 10-40kg to increase resistance as your strength develops. Lightweight: The lightweight design means you can carry in your bag and use on the go! | Hand Grip Strengthener | Wowcher