HAND STRENGTH can drastically improve with regular use, including flexibility in your fingers, wrists and forearms. Ease joint pain and aid with stiffness. Alleviate Repetitive Strain Injury ( RSI ).STRESS RELIEF balls fit comfortably into your hand due to their size and shape. Help aid anxiety and overcome habits such as knuckle cracking and broken skin scratching. Ergonomic design can be used to exercise your hands anytime and anywhere.TEAR RESISTANT TPR material, meaning these hand grips / stress ball will not break open. This specially formulated thermo-plastic rubber egg is the modern solution for strengthening wrists, hands, forearms and fingers as well as increasing hand coordination.3 STRENGTHS, Colour: Pink (Light), Purple (Medium) & Green (Strong)THE MAD GROUP are well known suppliers of fitness accessories to Studios, Gyms and Home Gyms worldwide. A UK company with a name you can trust Product Description This specially formulated thermo-plastic rubber egg is the modern solution for strengthening wrists, hands, forearms and fingers as well as increasing hand coordination. Simply squeeze the egg in any plane to target the required muscle. Ideal for players of all racquet sports and for rehabilitation and also a great anti-stress toy Product details: Material: TPR strength: Medium - Purple note: colours may vary from those shown. System Requirements continuity 2012 P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Manufacturer's Description This specially formulated thermo-plastic rubber egg is the modern solution for strengthening wrists, hands, forearms and fingers as well as increasing hand coordination. Simply squeeze the egg in any plane to target the required muscle.Ideal for players of all racquet sports and for rehabilitation and also a great anti-stress toy Box Contains 1 x Strong Grip 66-40