Fully Balanced Exercise Using the Finger Strengthener helps prevent injuries and muscle imbalances! Finger Strengthener are specially designed with tight thumb holes to prevent the bands from slipping off your fingers during your workout. 3 Levels of Resistance Hand grips that allow you to alternate between three grips in a single workout, gradually increasing the difficulty of your workout as your strength increases, or benefit from interval training. Flexible and Lightweight: Increase overall finger strength and dexterity. One size fits all Small enough to put in your purse or pocket Easy to use for just a few seconds or minutes. Environmental Material: 100% food grade silicone, non-toxic harmless Silicone, Safety and environmental protection. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.