【Training Effects】 This finger trainer is designed to strengthen finger muscles and improve grip strength. It's especially ideal for those who play sports or musical instruments. 【Durability】 Made of high-quality plastic material, it can withstand long-term use. The spring strength is also adjustable to accommodate individual training needs. 【Compact Design】 With its compact size, it's easy to carry and allows for training anytime, anywhere. Suitable for use at home or in the office. - Brand: ACTIVITEIT - Color: Blue - Material: Plastic - Type: Finger Trainer Thank you for looking. My son's grip strength has improved, so we no longer need it. It's been cleaned and disinfected. No pets, no smokers. Instant purchase OK. Thank you for looking.